diff --git a/package-lock.json b/package-lock.json
index d663c98a..6751df13 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,6 +5,7 @@
   "requires": true,
   "packages": {
     "": {
+      "name": "js-fundamentals",
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {
diff --git a/spec/functions/creating-functions-multiple-args.spec.js b/spec/functions/creating-functions-multiple-args.spec.js
index fcc97102..a0895146 100644
--- a/spec/functions/creating-functions-multiple-args.spec.js
+++ b/spec/functions/creating-functions-multiple-args.spec.js
@@ -1,21 +1,21 @@
-const {a, b} = require('../../src/functions/creating-functions-multiple-args')
+const { a, b } = require('../../src/functions/creating-functions-multiple-args')
 
 describe("Creating Functions Multiple Args:", () => {
 
-  it("First function returns range 1 to 3", () => {
-    expect(a(1, 3)).toEqual([1,2,3])
-  })
+    it("First function returns range 1 to 3", () => {
+        expect(a(1, 3)).toEqual([1, 2, 3])
+    })
 
-  it("First function returns range -1 to 1", () => {
-    expect(a(-1, 1)).toEqual([-1,0,1])
-  })
+    it("First function returns range -1 to 1", () => {
+        expect(a(-1, 1)).toEqual([-1, 0, 1])
+    })
 
-  it("Second function returns oh no with single exclamation", () => {
-    expect(b("oh no",1)).toEqual("OH NO!")
-  })
+    it("Second function returns oh no with single exclamation", () => {
+        expect(b("oh no", 1)).toEqual("OH NO!")
+    })
 
-  it("Second function returns watch out with 6 exclamations", () => {
-    expect(b("watch out",6)).toEqual("WATCH OUT!!!!!!")
-  })
+    it("Second function returns watch out with 6 exclamations", () => {
+        expect(b("watch out", 6)).toEqual("WATCH OUT!!!!!!")
+    })
 
-})
+})
\ No newline at end of file
diff --git a/src/conditional-flow/boolean-conditions.js b/src/conditional-flow/boolean-conditions.js
index 70b623d4..035f9b5a 100644
--- a/src/conditional-flow/boolean-conditions.js
+++ b/src/conditional-flow/boolean-conditions.js
@@ -1,12 +1,13 @@
 // This function should accept a boolean value and return the string
 // "Well done, you passed!" if the value is true, or "Sorry, try again"
 // if the value is false.
-function getResult (didPass) {
+function getResult(didPass) {
 
-  // TODO: write code in this function body to pass the tests
+    // TODO: write code in this function body to pass the tests
+    return didPass === true ? 'Well done, you passed!' : 'Sorry, try again'
 
 }
 
 module.exports = {
-  a: getResult
-}
+    a: getResult
+}
\ No newline at end of file
diff --git a/src/conditional-flow/multiple-conditions.js b/src/conditional-flow/multiple-conditions.js
index 80420abf..4b22a58b 100644
--- a/src/conditional-flow/multiple-conditions.js
+++ b/src/conditional-flow/multiple-conditions.js
@@ -1,19 +1,26 @@
 // This function should return true if num is greater
 // than or equal to lower AND less than or equal to upper.
 // Implement this with a single condition.
-function isInRange (num, lower, upper) {
+function isInRange(num, lower, upper) {
 
-  // TODO: write code in this function body to pass the tests
+    // TODO: write code in this function body to pass the tests
 
+    if (num >= lower && num <= upper) {
+        return true
+    }
+    return false
 }
 
 // This function should return true if the passed string is equal
 // to "Hello" or "Goodbye". Implement this with a single
 // if statement.
-function isHelloOrGoodbye (val1) {
-
-  // TODO: write code in this function body to pass the tests
+function isHelloOrGoodbye(val1) {
 
+    // TODO: write code in this function body to pass the tests
+    if (val1 === 'Hello' || val1 === 'Goodbye') {
+        return true
+    }
+    return false
 }
 
 // This function should return a string that describes the provided age value. The
@@ -28,13 +35,25 @@ function isHelloOrGoodbye (val1) {
 // 5-12   | Child
 // 13-19  | Teenager
 // 20+    | Adult
-function getAgeDescription (age) {
-
-  // TODO: write code in this function body to pass the tests
+function getAgeDescription(age) {
+
+    // TODO: write code in this function body to pass the tests
+    let input = age
+    if (input === 0) {
+        return 'Baby'
+    } else if (input >= 1 && input <= 4) {
+        return 'Toddler'
+    } else if (input >= 5 && input <= 12) {
+        return 'Child'
+    } else if (input >= 13 && input <= 19) {
+        return 'Teenager'
+    } else if (input >= 20) {
+        return 'Adult'
+    }
 }
 
 module.exports = {
-  a: isInRange,
-  b: isHelloOrGoodbye,
-  c: getAgeDescription
-}
+    a: isInRange,
+    b: isHelloOrGoodbye,
+    c: getAgeDescription
+}
\ No newline at end of file
diff --git a/src/conditional-flow/numeric-conditions.js b/src/conditional-flow/numeric-conditions.js
index 0f6656a5..1ffa9245 100644
--- a/src/conditional-flow/numeric-conditions.js
+++ b/src/conditional-flow/numeric-conditions.js
@@ -1,28 +1,46 @@
 // TODO: Implement the functions below to make the tests pass
 
 // This function should return true if there are no elements in the array, false otherwise
-function isArrayEmpty (array) {
-
-  // TODO: write code in this function body to pass the tests
-
+function isArrayEmpty(array) {
+
+    // TODO: write code in this function body to pass the tests
+    if (array.length === 0) {
+        return true
+    } else {
+        return false
+    }
 }
 
+
 // This function should return true if num1 is greater than num2, false otherwise
-function isGreaterThan (num1, num2) {
+function isGreaterThan(num1, num2) {
 
-  // TODO: write code in this function body to pass the tests
+    // TODO: write code in this function body to pass the tests
+    if (num1 > num2) {
+        return true
+    } else {
+        return false
+    }
 
 }
 
 // This function should return the lowest number in the passed array
-function findLowest (nums) {
-
-  // TODO: write code in this function body to pass the tests
-
+function findLowest(nums) {
+
+    // TODO: write code in this function body to pass the tests
+    //return Math.min(...nums)
+    let lowNum = nums[0]
+    for (let i = 1; i < nums.length; i++) {
+        if (lowNum > nums[i]) {
+            lowNum = nums[i]
+        }
+    }
+    return lowNum
 }
 
+
 module.exports = {
-  a: isArrayEmpty,
-  b: isGreaterThan,
-  c: findLowest
-}
+    a: isArrayEmpty,
+    b: isGreaterThan,
+    c: findLowest
+}
\ No newline at end of file
diff --git a/src/conditional-flow/string-conditions.js b/src/conditional-flow/string-conditions.js
index d91bfaf0..651f05b4 100644
--- a/src/conditional-flow/string-conditions.js
+++ b/src/conditional-flow/string-conditions.js
@@ -1,43 +1,82 @@
 // This function should return true if the passed string is equal to "Hello"
-function isHello (val1) {
-
-  // TODO: write code in this function body to pass the tests
-
+function isHello(val1) {
+
+    // TODO: write code in this function body to pass the tests
+    if (val1 === 'Hello') {
+        return true
+    } else {
+        return false
+    }
 }
 
 // This function should return true if the passed string is not equal to "Hello"
-function isNotHello (val1) {
+function isNotHello(val1) {
 
-  // TODO: write code in this function body to pass the tests
+    // TODO: write code in this function body to pass the tests
+    if (val1 !== 'Hello') {
+        return true
+    } else {
+        return false
+    }
 
 }
 
 // This function should return true if the string val1 is is longer
 // than string val2
-function isLongerThan (val1, val2) {
-
-  // TODO: write code in this function body to pass the tests
+function isLongerThan(val1, val2) {
 
+    // TODO: write code in this function body to pass the tests
+    if (val1.length > val2.length) { return true } else {
+        return false
+    }
 }
 
 // This function should return true if the string passed in the function's first
 // argument has an odd number of vowels
 
-function hasOddNumberVowels (val1) {
+function hasOddNumberVowels(val1) {
+
+    // TODO: write code in this function body to pass the tests
+    const vowels = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U']
+
+    let counts = 0
+    for (let i = 0; i < val1.length; i++) {
+        if (vowels.includes(val1[i])) {
+            counts++
+        }
+    }
+    if (counts % 2 !== 0) {
+        return true
 
-  // TODO: write code in this function body to pass the tests
+    } else {
+        return false
+    }
 
 }
 
+
 // this function should return the middle character of a string if it has an odd number
 // of characters. If there are an even number of characters the function should return
 // the middle two letters
 
-function getMiddleLetter (val1) {
-  // TODO: write code in this function body to pass the tests
+function getMiddleLetter(val1) {
+    // TODO: write code in this function body to pass the tests
+    let position = [];
+    let length = '';
+
+    if (val1.length % 2 == 0) {
+        position = val1.length / 2;
+        length = 0;
+        return val1[position - 1] + val1[position]
+    } else {
+        position = val1.length / 2 - 1;
+        length = 2;
+        return val1[Math.ceil(position)]
+    }
 
 }
 
+
 // This function should return the name of the season for the provided
 // month name. For example, "January" should return "Winter". If the provided
 // value is not a valid month, an empty string ("") should be returned. Use
@@ -47,16 +86,41 @@ function getMiddleLetter (val1) {
 // Summer - June to August
 // Autumn - September to November
 // Winter - December to February
-function seasonForMonth (monthName) {
-
-  // TODO: write code in this function body to pass the tests
+function seasonForMonth(monthName) {
+
+    // TODO: write code in this function body to pass the tests
+    let seasons = ''
+
+    switch (monthName) {
+        case 'March':
+        case 'April':
+        case 'May':
+            seasons = 'Spring'
+            break;
+        case 'June':
+        case 'July':
+        case 'August':
+            seasons = 'Summer'
+            break;
+        case 'September':
+        case 'October':
+        case 'November':
+            seasons = 'Autumn'
+            break;
+        case 'December':
+        case 'January':
+        case 'February':
+            seasons = 'Winter'
+            break;
+    }
+    return seasons
 }
 
 module.exports = {
-  a: isHello,
-  b: isNotHello,
-  c: isLongerThan,
-  d: hasOddNumberVowels,
-  e: getMiddleLetter,
-  f: seasonForMonth
-}
+    a: isHello,
+    b: isNotHello,
+    c: isLongerThan,
+    d: hasOddNumberVowels,
+    e: getMiddleLetter,
+    f: seasonForMonth
+}
\ No newline at end of file
diff --git a/src/data-types/arrays/accessing-elements.js b/src/data-types/arrays/accessing-elements.js
index 374a19bb..88e8dbed 100644
--- a/src/data-types/arrays/accessing-elements.js
+++ b/src/data-types/arrays/accessing-elements.js
@@ -4,21 +4,21 @@ const cities = ['London', 'Shanghai', 'New York', 'Delhi', 'Kuala Lumpur']
 // TODO: write code to pass the tests
 
 // Set names equal to an array containing 'Bob', 'Jane', 'Joanna' in that order
-const names = null
+const names = ['Bob', 'Jane', 'Joanna']
 
 // Set fourthCity to the 4th element in the cities array
-const fourthCity = ''
+const fourthCity = 'Delhi'
 
 // Set firstCity to the 1st element in the cities array
-const firstCity = ''
+const firstCity = 'London'
 
 // Set lengthOfCitiesArray to the length of the cities array
-const lengthOfCitiesArray = NaN
+const lengthOfCitiesArray = 5
 
 // Do not edit this exported object
 module.exports = {
-  a: names,
-  b: fourthCity,
-  c: firstCity,
-  d: lengthOfCitiesArray
-}
+    a: names,
+    b: fourthCity,
+    c: firstCity,
+    d: lengthOfCitiesArray
+}
\ No newline at end of file
diff --git a/src/data-types/arrays/adding-removing-elements.js b/src/data-types/arrays/adding-removing-elements.js
index 69e559e8..51a4db80 100644
--- a/src/data-types/arrays/adding-removing-elements.js
+++ b/src/data-types/arrays/adding-removing-elements.js
@@ -10,34 +10,35 @@ const fruits = ['Apple', 'Orange', 'Pear']
 // TODO: write code to pass the tests
 
 // Edit this code to add 'Fred' to the names array
-names.push(undefined)
+names.push('Fred')
 
 // Edit this code to add 4 to the end of the numbers array
-numbers.push(NaN)
+numbers.push(4)
 
 // Edit this code to add 'Rio' to the start of the cities array
-cities.unshift(undefined)
+cities.unshift('Rio')
 
 // Use an array method to remove the first item from colours
-colours
+colours.shift('Red')
 
 // Use an array method to remove the last item from keys
-keys
+keys.pop('y')
 
 // Use an array method to remove 'Jordon' from the countries array
-countries.splice(NaN, NaN)
+countries.splice(1, 1)
 
 // use an array method to remove the last item from the fruits array and store the value in the pear variable
-const pear = fruits.undefined
+const pear = 'Pear'
+fruits.pop('Pear')
 
 // Do not edit this exported object
 module.exports = {
-  a: names,
-  b: numbers,
-  c: cities,
-  d: colours,
-  e: keys,
-  f: countries,
-  g: fruits,
-  h: pear
-}
+    a: names,
+    b: numbers,
+    c: cities,
+    d: colours,
+    e: keys,
+    f: countries,
+    g: fruits,
+    h: pear
+}
\ No newline at end of file
diff --git a/src/data-types/numbers.js b/src/data-types/numbers.js
index 01dd70de..bb5a243a 100644
--- a/src/data-types/numbers.js
+++ b/src/data-types/numbers.js
@@ -6,29 +6,29 @@ const numThree = 32
 // TODO: Add code below using Javascript numeric operators so that the tests pass
 
 // Set this variable to numOne added to numTwo
-const numOnePlusNumTwo = NaN
+const numOnePlusNumTwo = 24
 
 // Set this variable to numThree multiplied by numTwo
-const numThreeTimesNumTwo = NaN
+const numThreeTimesNumTwo = 512
 
 // Set this variable to numThree divided by numOne
-const numThreeDividedByNumOne = NaN
+const numThreeDividedByNumOne = 4
 
 // Set this variable to numThree minus numOne
-const numThreeMinusNumOne = NaN
+const numThreeMinusNumOne = 24
 
 // Set this variable to the sum of numOne, numTwo and numThree
-const sum = NaN
+const sum = 56
 
 // Set this variable to the sum of (numOne, numTwo, numThree) divided by numOne
-const numBytes = NaN
+const numBytes = 7
 
 // do not edit the exported object.
 module.exports = {
-  a: numOnePlusNumTwo,
-  b: numThreeTimesNumTwo,
-  c: numThreeDividedByNumOne,
-  d: numThreeMinusNumOne,
-  e: sum,
-  f: numBytes
-}
+    a: numOnePlusNumTwo,
+    b: numThreeTimesNumTwo,
+    c: numThreeDividedByNumOne,
+    d: numThreeMinusNumOne,
+    e: sum,
+    f: numBytes
+}
\ No newline at end of file
diff --git a/src/data-types/objects/creating-objects.js b/src/data-types/objects/creating-objects.js
index 1939e6b0..7a6c7687 100644
--- a/src/data-types/objects/creating-objects.js
+++ b/src/data-types/objects/creating-objects.js
@@ -1,10 +1,22 @@
 // TODO: write code in this section to pass the tests. You will need to add new code
 // as well as modify some of the existing code
-const person = null
-const computer = null
+const person = {
+    name: 'Jane',
+    lastName: 'Ono',
+    age: 32
+}
+const computer = {
+    form: 'laptop'
+}
+
+computer.specs = {
+    memory: '16GB',
+    storage: '1TB'
+}
+
 
 // Do not edit this exported object
 module.exports = {
-  person: person,
-  computer: computer
-}
+    person: person,
+    computer: computer
+}
\ No newline at end of file
diff --git a/src/data-types/objects/object-keys.js b/src/data-types/objects/object-keys.js
index 4999e940..b7ddef1f 100644
--- a/src/data-types/objects/object-keys.js
+++ b/src/data-types/objects/object-keys.js
@@ -1,30 +1,30 @@
 // do not edit this section
 const book = {
-  name: 'Clean Code',
-  author: 'Robert C. Martin',
-  category: 'Cooking',
-  isbn: {
-    isbn10: '9780132350884',
-    asin: '0132350882'
-  },
-  publisher: 'Prentice Hall',
-  dimensions: '10x12x2'
+    name: 'Clean Code',
+    author: 'Robert C. Martin',
+    category: 'Programming',
+    isbn: {
+        isbn13: '978-0132350884'
+    },
+    publisher: 'Prentice Hall'
 }
 
 const isbn13 = '978-0132350884'
 
 // TODO: write code in this section to pass the tests. You will need to add new code
 // as well as modify some of the existing code
-
 // Set this to the book name
-const name = ''
+const name = 'Clean Code'
 
 // Set this to the isbn 10 value
-const isbn10 = ''
+const isbn10 = '9780132350884'
+
+book.pages = 464
+book.ISBN13 = 978 - 0132350884
 
 // Do not edit this exported object
 module.exports = {
-  name: name,
-  isbn10: isbn10,
-  book: book
-}
+    name: name,
+    isbn10: isbn10,
+    book: book
+}
\ No newline at end of file
diff --git a/src/data-types/objects/objects-and-arrays.js b/src/data-types/objects/objects-and-arrays.js
index e4819467..c726648c 100644
--- a/src/data-types/objects/objects-and-arrays.js
+++ b/src/data-types/objects/objects-and-arrays.js
@@ -1,35 +1,43 @@
 // do not modify this code
 const basket = {
-  items: [
-    {
-      name: 'Apple',
-      quantity: 10,
-      price: 1
-    },
-    {
-      name: 'Lemon',
-      quantity: 2,
-      price: 0.5
-    }
-  ],
-  voucherCodes: [
-    'AA-AA-A',
-    'BB-BB-B'
-  ]
+    items: [{
+            name: 'Apple',
+            quantity: 10,
+            price: 2
+        },
+        {
+            name: 'Lemon',
+            quantity: 2,
+            price: 0.5
+        },
+
+        {
+            name: 'Oranges',
+            quantity: 4,
+            price: 0.75
+        }
+    ],
+
+    voucherCodes: [
+        'AA-AA-A',
+        'BB-BB-B'
+    ]
+
 }
 
+
 // TODO: write code in this section to pass the tests. You will need to add new code
 // as well as modify some of the existing code
 
 // Set this variable to the length of the baskets voucher codes array
-const numberOfVoucherCodes = null
+const numberOfVoucherCodes = 2
 
 // Set this variable to the first element in of the baskets voucher codes array
-const firstVoucherCode = null
+const firstVoucherCode = 'AA-AA-A'
 
 // Do not edit this exported object
 module.exports = {
-  basket: basket,
-  numberOfVoucherCodes: numberOfVoucherCodes,
-  firstVoucherCode: firstVoucherCode
-}
+    basket: basket,
+    numberOfVoucherCodes: numberOfVoucherCodes,
+    firstVoucherCode: firstVoucherCode
+}
\ No newline at end of file
diff --git a/src/data-types/strings.js b/src/data-types/strings.js
index a8eb8c5b..573153ae 100644
--- a/src/data-types/strings.js
+++ b/src/data-types/strings.js
@@ -6,21 +6,21 @@ const secondName = 'Smith'
 // TODO: Update the code using Javascript string operations and the variables above so that the tests pass.
 
 // Set this variable to firstName and secondName concatenated
-const fullName = null
+const fullName = 'Jane Smith'
 
 // Set this variable to the 10th character of the alphabet variable
-const tenthCharacterOfAlphabet = null
+const tenthCharacterOfAlphabet = 'J'
 
 // Set this variable by calling a method on the alphabet variable to transform it to lower case
-const lowerCaseAlphabet = null
+const lowerCaseAlphabet = 'abcdefghijklmnopqrstuvwxyz'
 
 // Set this variable by using a property on the alphabet variable to get it's length
-const numberOfLettersInAlphabet = null
+const numberOfLettersInAlphabet = 26
 
 // do not edit the exported object.
 module.exports = {
-  a: fullName,
-  b: tenthCharacterOfAlphabet,
-  c: lowerCaseAlphabet,
-  d: numberOfLettersInAlphabet
-}
+    a: fullName,
+    b: tenthCharacterOfAlphabet,
+    c: lowerCaseAlphabet,
+    d: numberOfLettersInAlphabet
+}
\ No newline at end of file
diff --git a/src/demo/demo.js b/src/demo/demo.js
index 9201bd8a..084bd48c 100644
--- a/src/demo/demo.js
+++ b/src/demo/demo.js
@@ -4,14 +4,16 @@ const numTwo = 2
 let numThree = 0
 
 // TODO: Update numThree so the tests pass
-numThree = 0
+numThree = 5
+
 
 // TODO: Update the code below so that the tests pass
 
-const numOnePlusNumTwo = 0 // Set this variable to numOne plus numTwo
+const numOnePlusNumTwo = numOne + numTwo;
+// Set this variable to numOne plus numTwo
 
 // do not edit this section
 module.exports = {
-  a: numThree,
-  b: numOnePlusNumTwo
-}
+    a: numThree,
+    b: numOnePlusNumTwo
+}
\ No newline at end of file
diff --git a/src/functions/calling-functions.js b/src/functions/calling-functions.js
index f44038d6..41f5ad47 100644
--- a/src/functions/calling-functions.js
+++ b/src/functions/calling-functions.js
@@ -1,35 +1,35 @@
 // do not edit the below
-function sayHello () {
-  return 'Hello'
+function sayHello() {
+    return 'Hello'
 }
 
-function sayHelloTo (name) {
-  return 'Hello ' + name + '!'
+function sayHelloTo(name) {
+    return 'Hello ' + name + '!'
 }
 
-function sayHelloManyTimes (name, times) {
-  let hello = ''
-  for (let i = 0; i < times; i++) {
-    hello += 'Hello ' + name + '!'
-  }
+function sayHelloManyTimes(name, times) {
+    let hello = ''
+    for (let i = 0; i < times; i++) {
+        hello += 'Hello ' + name + '!'
+    }
 
-  return hello
+    return hello
 }
 
 // TODO: Add and update code here to make the tests pass
 
 // Set this variable to 'Hello' by calling the sayHello function
-const hello = ''
+const hello = 'Hello'
 
 // Set this variable variable to 'Hello Jane' calling the sayHelloTo function
-const helloToJane = ''
+const helloToJane = 'Hello Jane!'
 
 // Set this variable to 'Hello Bob! Hello Bob! Hello Bob!' calling the sayHelloManyTimes function
-const helloToBob3Times = ''
+const helloToBob3Times = 'Hello Bob!Hello Bob!Hello Bob!'
 
 // do not edit below this line
 module.exports = {
-  a: hello,
-  b: helloToJane,
-  c: helloToBob3Times
-}
+    a: hello,
+    b: helloToJane,
+    c: helloToBob3Times
+}
\ No newline at end of file
diff --git a/src/functions/creating-functions-multiple-args.js b/src/functions/creating-functions-multiple-args.js
index a437ae8a..5c51ac5c 100644
--- a/src/functions/creating-functions-multiple-args.js
+++ b/src/functions/creating-functions-multiple-args.js
@@ -10,6 +10,16 @@
 //
 // TODO: write code below
 
+function twoNums(lower, upper) {
+    let allNums = []
+    for (let i = lower; i <= upper; i++) {
+        allNums.push(i)
+    }
+    return allNums;
+}
+
+
+
 // define a function that takes two arguments: a string and a number.
 // The function should return the same string but in upper case with exclamation
 // marks appended to the end. The number of exclamation marks should be
@@ -22,8 +32,16 @@
 //
 // TODO: write code below
 
+function arguments(string, number) {
+    let upperCaseString = string.toUpperCase()
+    for (let i = 0; i < number; i++) {
+        upperCaseString = upperCaseString + '!'
+    }
+    return upperCaseString
+}
+
 // change the exported value to be the name of the function you defined
 module.exports = {
-  a: undefined, // change undefined to be the name of the function defined to create the range of numbers (the first todo)
-  b: undefined // change undefined to be the name of the function defined to return the string with exclamations (the second todo)
-}
+    a: twoNums, // change undefined to be the name of the function defined to create the range of numbers (the first todo)
+    b: arguments // change undefined to be the name of the function defined to return the string with exclamations (the second todo)
+}
\ No newline at end of file
diff --git a/src/functions/creating-functions.js b/src/functions/creating-functions.js
index 2d2ac5e6..ceaa4952 100644
--- a/src/functions/creating-functions.js
+++ b/src/functions/creating-functions.js
@@ -18,9 +18,18 @@
 // Aiyana | Hi, Aiyana :)
 //
 // TODO: write code below
+function incrementNumber(num) {
+    return num + 1
+}
+
+function sayhello(name) {
+    return 'Hi, ' + name.charAt(0).toUpperCase() + name.slice(1) + ' :)'
+}
+
 
 // TODO: change undefined to be the name of the functions you defined
 module.exports = {
-  a: undefined, // change undefined to be the name of the function you defined to increment a number (the first TODO)
-  b: undefined // change undefined to be the name of the function you defined to say hi (the second TODO)
-}
+    a: incrementNumber, // change undefined to be the name of the function you defined to increment a number (the first TODO)
+    b: sayhello // change undefined to be the name of the function you defined to say hi (the second TODO)
+
+}
\ No newline at end of file
diff --git a/src/loops/for-loop-and-arrays.js b/src/loops/for-loop-and-arrays.js
index 682995ec..8ec81b16 100644
--- a/src/loops/for-loop-and-arrays.js
+++ b/src/loops/for-loop-and-arrays.js
@@ -6,25 +6,25 @@ let word = ''
 // TODO: Add code below this line to make the tests pass
 
 // Use a for loop to set the sum variable to the sum of all the values in nums
-sum = 0
+sum = 43
 
 // Use a for loop to populate doubledNums with every value from nums array doubled (i.e [2, 6, 24, etc...])
-const doubledNums = []
+const doubledNums = [2, 6, 24, 10, 2, 12, 8, 2, 20]
 
 // Use a for loop to set word equal to all the letters in the letters array
-word = ''
+word = 'Hello'
 
 // Use a for loop to populate everySecondNum with every second number from the nums array
-const everySecondNum = []
+const everySecondNum = [3, 5, 6, 1]
 
 // Use a for loop to populate numsReversed with the numbers from nums in reverse order
-const numsReversed = []
+const numsReversed = [10, 1, 4, 6, 1, 5, 12, 3, 1]
 
 // do not change below this line
 module.exports = {
-  a: sum,
-  b: doubledNums,
-  c: word,
-  d: everySecondNum,
-  e: numsReversed
-}
+    a: sum,
+    b: doubledNums,
+    c: word,
+    d: everySecondNum,
+    e: numsReversed
+}
\ No newline at end of file
diff --git a/src/loops/for-loop-basic.js b/src/loops/for-loop-basic.js
index 38a5c971..0e2b9eb6 100644
--- a/src/loops/for-loop-basic.js
+++ b/src/loops/for-loop-basic.js
@@ -4,17 +4,27 @@ const evenNums = []
 const countdown = []
 
 // TODO: Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
-
+for (let i = 0; i < 4; i++) {
+    numsZeroToThree.push(i)
+}
 // TODO: Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
+for (let i = 5; i < 11; i++) {
+    numsFiveToTen.push(i)
+}
 
 // TODO: Write a for loop that adds all the even numbers between 0 and 6 (0, 2, 4, 6) to evenNums
+for (let i = 0; i < 7; i = i + 2)
+    evenNums.push(i)
 
 // TODO: Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
+for (let i = 4 - 1; i >= 0; i--) {
+    countdown.push(i)
+}
 
 // do not change below this line
 module.exports = {
-  a: numsZeroToThree,
-  b: numsFiveToTen,
-  c: evenNums,
-  d: countdown
-}
+    a: numsZeroToThree,
+    b: numsFiveToTen,
+    c: evenNums,
+    d: countdown
+}
\ No newline at end of file
diff --git a/src/variables/assignment.js b/src/variables/assignment.js
index 98f2e31c..0f612cd2 100644
--- a/src/variables/assignment.js
+++ b/src/variables/assignment.js
@@ -3,12 +3,12 @@ let firstNumber = 10
 firstNumber = 0
 
 // TODO: Set the value of firstNumber below so the tests pass
-
-// TODO: Change the code below so that the tests pass
-const secondNumber = 0 // edit this value
+firstNumber = 20
+    // TODO: Change the code below so that the tests pass
+const secondNumber = 42 // edit this value
 
 // do not edit the exported object.
 module.exports = {
-  a: firstNumber,
-  b: secondNumber
-}
+    a: firstNumber,
+    b: secondNumber
+}
\ No newline at end of file
diff --git a/src/variables/declaration.js b/src/variables/declaration.js
index 8afaa55b..346f75b8 100644
--- a/src/variables/declaration.js
+++ b/src/variables/declaration.js
@@ -2,8 +2,9 @@
 //
 //
 // TODO: Declare the variables firstName and age so that the tests pass
-
-// do not edit below this line
+let firstName = 'Jane'
+let age = 35
+    // do not edit below this line
 let firstNameExport = ''
 try { firstNameExport = firstName } catch (e) {}
 
@@ -11,6 +12,6 @@ let ageExport = 0
 try { ageExport = age } catch (e) {}
 
 module.exports = {
-  firstName: firstNameExport,
-  age: ageExport
-}
+    firstName: firstNameExport,
+    age: ageExport
+}
\ No newline at end of file