Basic Loop Quiz

Loop-Array/countingSheep.js

@@ -4,8 +4,19 @@
 
 function countSheeps(sheep) {
   // TODO
+  let benar = 0;
+
+  //looping
+  for(let i=0; i < sheep.length; i++ ){
+    if(sheep[i] == true){
+      benar++;
+    } 
+  }
+  return benar;
 }
 
+
+
 console.log(countSheeps([])) //0
 console.log(countSheeps([undefined])) //0
 console.log(countSheeps([null])) //0
@@ -17,5 +28,4 @@ console.log(countSheeps(
    true,false,true,false,
    true,false,false,true,
    true,true,true,true,
-   false,false,true,true
-])) //17
+   false,false,true,true])) //17

Loop-Array/findHighest.js

@@ -4,6 +4,15 @@
 
 function findHighestInt(arr) {
   //your code here
+  let high = 0;
+
+  //Loop
+  for(let i = 0; i <= arr.length; i++){
+    if(arr[i] > high){
+      high = arr[i];
+    }
+  }
+  return high;
 
 }
 

Loop-Array/findNeedle.js

@@ -4,6 +4,12 @@
 
 function findNeedle(haystack) {
   // your code here
+  for (let i = 0; i <= haystack.length; i++){
+    if (haystack[i] === "needle"){
+      return `found the needle at position ${i}`
+    }
+  }
+
 }
 
 let haystack_1 = ['3', '123124234', undefined, 'needle', 'world', 'hay', 2, '3', true, false];

Loop-Array/findSmallest.js

@@ -4,7 +4,15 @@
 
 function findSmallestInt(arr) {
   //your code here
-
+  let kecil = 500;
+
+  // Loop
+  for(let i = 0; i <= arr.length; i++){
+    if(arr[i] < kecil){
+      kecil = arr[i];
+    }
+  }
+  return kecil;
 }
 
 console.log(findSmallestInt([78,56,232,12,8])); //8

Loop-Array/positifSum.js

@@ -4,6 +4,15 @@
 
 function positiveSum(arr) {
   //code here
+  let cum = 0;
+
+  //Looping
+  for(let i = 0; i <= arr.length; i++){
+    if(arr[i] > 0){
+      cum = cum + arr[i];
+    }
+  }
+  return cum;
 }
 
 console.log(positiveSum([1,2,3,4,5])) //15

Loop-Array/squareSum.js

@@ -4,6 +4,12 @@
 
 function squareSum(numbers){
   //code here
+  let hasil = 0;
+  for(let i = 0; i < numbers.length; i++){
+    let angka = numbers[i] **2;
+    hasil = hasil + angka;
+  }
+  return hasil;
 }
 
 console.log(squareSum([1,2])); //5

Loop-Number/centuryYear.js

@@ -6,7 +6,12 @@
 
 function century(year) {
   // Finish this :)
-  return;
+  let abad = 1;
+  while (year > 100){
+    year = year - 100;
+    abad = abad + 1;
+  }
+  return abad;
 }
 
 console.log(century(1705)); //18

Loop-Number/summation.js

@@ -5,6 +5,11 @@
 
 function summation (num) {
   // Code here
+  let angka = 0;
+  for(let i = 1; i <= num; i++){
+    angka = angka + i;
+  }
+  return angka;
 }
 
 console.log(summation(1)); //1

Loop-String/abbrevName.js

@@ -5,6 +5,12 @@
 
 function abbrevName(name){
   //code here
+  let hasil = "";
+  for(let i = 0; i <= name.length; i++){
+    if(name[i] >= 'A' && name[i] <= 'Z') hasil += name[i];
+    if(name[i] === " ") hasil += "."; 
+  }
+  return hasil;
 }
 
 console.log(abbrevName("Sam Harris")); //S.H

Loop-String/noSpace.js

@@ -4,6 +4,12 @@
 
 function noSpace(x){
   //code here
+  let hasil = "";
+
+  for(let i = 0; i <= x.length; i++){
+    if(x[i] !==" ") hasil += x[i];
+  }
+  return hasil
 
 }
 

Loop-String/removeChar.js

@@ -3,8 +3,14 @@
 //source: https://www.codewars.com/kata/56bc28ad5bdaeb48760009b0
 
 function removeChar(str){
-
-};
+  let hasil = "";
+    for(let i = 0; i <= str.length; i++){
+        if(i > 0 && i < str.length-1){
+            hasil += str[i];
+        }
+    }
+    return hasil;
+}
 
 console.log(removeChar('eloquent')); //loquen
 console.log(removeChar('country')); //ountr

Loop-String/stringRepeat.js

@@ -4,6 +4,11 @@
 
 function repeatStr (n, s) {
   //code here
+  let hasil = "";
+  for(let i = 0; i < n; i++){
+    hasil = hasil + n;
+  }
+  return hasil;
 }
 
 console.log(repeatStr(3, "*")); //***

Pattern-Printing/diamond.js

@@ -1,6 +1,36 @@
 function berlian(num) {
-  let pattern = '';
+
   // code here
+  let pattern = "";
+
+  //loop segitiga atas
+  for(let i = 0; i < num; i++){
+    //Loop Spasi
+    for(let j = 0; j < num - i - 1; j++){
+      pattern += " ";
+    }
+    // Loop Bintang
+    for(let k = 0; k < 2 * i + 1; k++){
+      pattern += "*";
+    }
+    pattern += `\n`;
+  }
+  //Loop Bawah
+  for (let i = num - 2; i >= 0; i--) {
+
+    // spasi
+    for (let j = 0; j < num - i - 1; j++) {
+      pattern += ' ';
+    }
+
+    // bintang
+    for (let k = 0; k < 2 * i + 1; k++) {
+      pattern += '*';
+    }
+
+
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/papanCatur.js

@@ -4,6 +4,16 @@
 function papanCatur(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num; i++){
+    for(let j = 0; j < num; j++){
+      if((i+j) % 2 == 0){
+        pattern += `#`;
+      }else{
+        pattern += ` `;
+      } 
+    }
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/patternX.js

@@ -5,6 +5,16 @@
 function polaX(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num; i++){
+    for(let j = 0; j < num; j++){
+      if((i === j) || (i + j === num - 1)){
+        pattern += '*';
+      }else{
+        pattern += ' ';
+      }
+    }
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/persegi.js

@@ -2,6 +2,12 @@
 function persegi(num) {
   let pattern = '';
   // code here
+  for(let i = 0 ; i < num; i++){
+    for(let j = 0; j < num; j++){
+      pattern += '*';
+    }
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/persegiBolong.js

@@ -2,6 +2,16 @@
 function persegiBolong(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num; i++){
+    for(let j = 0; j < num; j++){
+      if(i == 0 || i == num -1 || j == 0 || j == num-1){
+        pattern += '*';
+      }else{
+        pattern += ' ';
+      }
+    }
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/piramid.js

@@ -3,9 +3,20 @@
 function piramida(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num ; i++){
+    for(let j = 0; j <  num - i - 1; j++){
+    pattern += ' ';
+    }
+    for (let k = 0; k < 2 * i + 1; k++) {
+      pattern += '*';
+    }
+
+    pattern += '\n';
+  }
   return pattern;
 }
 
+
 // use case
 console.log(piramida(5));
 /*

Pattern-Printing/piramid2.js

@@ -3,6 +3,16 @@
 function piramida2(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num ; i++){
+    for(let j = 0; j <  num - i - 1; j++){
+    pattern += ' ';
+    }
+    for (let k = 0; k < i ; k++) {
+      pattern += '* ';
+    }
+    pattern += '*';
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/piramidTerbalik.js

@@ -1,6 +1,18 @@
 function piramidaTerbalik(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num ; i++){
+
+    for(let j = 0; j < i; j++){
+    pattern += ' ';
+    }
+
+    for (let k = 0; k < 2 * (num - i) - 1; k++) {
+      pattern += '*';
+    }
+
+    pattern += '\n';
+  }
   return pattern;
 }
 
@@ -9,7 +21,7 @@ console.log(piramidaTerbalik(5));
 /*
 expected result
 *********
- *******
+ ******* 
   *****
    ***
     *

Pattern-Printing/segitigaSiku.js

@@ -2,6 +2,12 @@
 function segitigaSiku(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i <= num; i++){
+    for(let j = 0; j < i; j++){
+      pattern += '*';
+    }
+    pattern += '\n';
+  }
   return pattern;
 }
 

Pattern-Printing/segitigaSikuTerbalik.js

@@ -2,6 +2,13 @@
 function segitigaTerbalik(num) {
   let pattern = '';
   // code here
+  for(let i = 0; i < num ; i++){
+    for (let k = 0; k < num - i ; k++) {
+      pattern += '*';
+    }
+
+    pattern += '\n';
+  }
   return pattern;
 }