1) Print 1–10 Using while
Use a while loop to print numbers 1 to 10.
2) Print Even Numbers 2–20
Use a while loop to print even numbers from 2 to 20.
3) Count Down 10–1
Print numbers 10 down to 1 using a while loop.
4) Sum of First N Numbers
Ask the user for n. Use a while loop to compute and print the sum from 1 to n.
5) Multiplication Table
Ask user for a number x.
Use while loop to print table for x from 1 to 10.
6) Print Characters of a String
Ask for a word.
Use a while loop to print each character one per line.
7) Count Down by 2s
Start from 20 and use while to print 20, 18, 16, … down to 2.
Ask the user to enter input repeatedly until they type "quit".
9) Loop Until Valid Number
Ask for a number ≥ 0.
Keep asking until they provide a valid non-negative number.
10) Factorial Calculation
Ask user for a number n.
Use while to compute n! and print.
Example: if n = 4, result = 24.
11) Guess the Number (Simple)
Set a secret number inside your code.
Ask the user to guess until they get it right.
12) Print a Pattern
Use while to print:
13) Reverse a Number
Ask user for an integer and use a while loop to reverse it numerically.
Example: input 123 → output 321.
14) Count Vowels in String
Ask for a string.
Use a while loop to count vowels (a, e, i, o, u).
15) Count Digits
Ask for a number and use while to count how many digits it has.
16) Print Squares
Use while loop to print square of numbers 1 to 10.
17) Stop at First Even
Ask for multiple numbers (loop).
Stop (using break) as soon as an even number is entered.
18) Loop with Continue
Use while to print numbers 1 to 10, but skip multiples of 3.
19) Print Multiples of 5 Until 50
Use while to print:
20) User Login Attempts
Ask user for password.
Allow up to 3 attempts using a while loop.
Print Access granted if correct, else Access denied after 3 tries.
📝 Example Output Pattern
Count Down 10–1:
canvil:
333f6c7d-6876-4f7e-b6ad-1bdb2233f5c1
