diff --git a/jeet.txt b/jeet.txt
index e69de29..fcd6bcb 100644
--- a/jeet.txt
+++ b/jeet.txt
@@ -0,0 +1 @@
+jeet011@gmail.com
\ No newline at end of file
diff --git a/jeet_issue_07.py b/jeet_issue_07.py
new file mode 100644
index 0000000..c2b9ed8
--- /dev/null
+++ b/jeet_issue_07.py
@@ -0,0 +1,33 @@
+def binary_to_decimal(binary_str):
+    """Convert binary string to decimal integer"""
+    try:
+        return int(binary_str, 2)
+    except ValueError:
+        return "❌ Invalid binary number!"
+
+
+def decimal_to_binary(decimal_num):
+    """Convert decimal integer to binary string"""
+    try:
+        return bin(int(decimal_num))[2:]  # remove '0b' prefix
+    except ValueError:
+        return "❌ Invalid decimal number!"
+
+
+# Main program
+print("🔄 Binary ↔ Decimal Converter 🔄")
+print("1️⃣ Binary → Decimal")
+print("2️⃣ Decimal → Binary")
+
+choice = input("Enter your choice (1 or 2): ")
+
+if choice == '1':
+    binary = input("Enter a binary number: ")
+    print(f"Decimal: {binary_to_decimal(binary)}")
+
+elif choice == '2':
+    decimal = input("Enter a decimal number: ")
+    print(f"Binary: {decimal_to_binary(decimal)}")
+
+else:
+    print("❌ Invalid choice! Please enter 1 or 2.")
diff --git a/jeet_issue_14.py b/jeet_issue_14.py
new file mode 100644
index 0000000..9ab01ff
--- /dev/null
+++ b/jeet_issue_14.py
@@ -0,0 +1,19 @@
+import random
+
+print("🎯 Welcome to the Number Guessing Game! 🎯")
+
+# Generate a random number between 1 and 100
+number = random.randint(1, 100)
+attempts = 0
+
+while True:
+    guess = int(input("Enter your guess (1-100): "))
+    attempts += 1
+
+    if guess < number:
+        print("📉 Too low! Try again.")
+    elif guess > number:
+        print("📈 Too high! Try again.")
+    else:
+        print(f"🎉 Congratulations! You guessed it in {attempts} attempts.")
+        break
diff --git a/jeet_issue_19.py b/jeet_issue_19.py
new file mode 100644
index 0000000..b22fa4f
--- /dev/null
+++ b/jeet_issue_19.py
@@ -0,0 +1,9 @@
+# Leap Year Checker
+
+year = int(input("Enter a year: "))
+
+# Leap year conditions
+if (year % 400 == 0) or (year % 100 != 0 and year % 4 == 0):
+    print(f"{year} is a leap year.")
+else:
+    print(f"{year} is not a leap year.")
diff --git a/jeet_issue_21.py b/jeet_issue_21.py
new file mode 100644
index 0000000..1a6e6c6
--- /dev/null
+++ b/jeet_issue_21.py
@@ -0,0 +1,46 @@
+# Temperature Converter
+
+def celsius_to_fahrenheit(c):
+    return (c * 9/5) + 32
+
+def fahrenheit_to_celsius(f):
+    return (f - 32) * 5/9
+
+def celsius_to_kelvin(c):
+    return c + 273.15
+
+def kelvin_to_celsius(k):
+    return k - 273.15
+
+def fahrenheit_to_kelvin(f):
+    return (f - 32) * 5/9 + 273.15
+
+def kelvin_to_fahrenheit(k):
+    return (k - 273.15) * 9/5 + 32
+
+
+print("=== Temperature Converter ===")
+print("1. Celsius to Fahrenheit")
+print("2. Fahrenheit to Celsius")
+print("3. Celsius to Kelvin")
+print("4. Kelvin to Celsius")
+print("5. Fahrenheit to Kelvin")
+print("6. Kelvin to Fahrenheit")
+
+choice = int(input("\nEnter your choice (1-6): "))
+temp = float(input("Enter temperature value: "))
+
+if choice == 1:
+    print(f"{temp}°C = {celsius_to_fahrenheit(temp):.2f}°F")
+elif choice == 2:
+    print(f"{temp}°F = {fahrenheit_to_celsius(temp):.2f}°C")
+elif choice == 3:
+    print(f"{temp}°C = {celsius_to_kelvin(temp):.2f} K")
+elif choice == 4:
+    print(f"{temp} K = {kelvin_to_celsius(temp):.2f}°C")
+elif choice == 5:
+    print(f"{temp}°F = {fahrenheit_to_kelvin(temp):.2f} K")
+elif choice == 6:
+    print(f"{temp} K = {kelvin_to_fahrenheit(temp):.2f}°F")
+else:
+    print("Invalid choice! Please select a number between 1 and 6.")