Java > 🧑💻 Loops Basics Exercise
Problem 1: Print Numbers using a For Loop
Description:
Write a Java program that prints numbers from 1 to N using a for loop.
Example:
Input: Take an integer N from the user (e.g., 5) Output: 1 2 3 4 5
Problem 2: Sum of N Natural Numbers
Description:
Write a Java program to find the sum of the first N natural numbers using a for loop.
Example:
Input: Take an integer N from the user (e.g., 5) Output: Sum = 15
Problem 3: Multiplication Table Generator
Description:
Write a Java program that prints the multiplication table of a given number using a for loop.
Example:
Input: Take an integer num from the user (e.g., 3) Output: 3 x 1 = 3 3 x 2 = 6 ... 3 x 10 = 30
Problem 4: Reverse a Number using a While Loop
Description:
Write a Java program that reverses a given number using a while loop.
Example:
Input: Take an integer num from the user (e.g., 1234) Output: Reversed Number: 4321
Problem 5: Check for Prime Number using a For Loop
Description:
Write a Java program to check if a number is prime using a for loop.
Example:
Input: Take an integer num from the user (e.g., 7) Output: 7 is a prime number
Problem 6: Factorial Calculation using a For Loop
Description:
Write a Java program to calculate the factorial of a number using a for loop.
Example:
Input: Take an integer num from the user (e.g., 5) Output: Factorial = 120
Problem 7: Fibonacci Series using a While Loop
Description:
Write a Java program that prints the first N Fibonacci numbers using a while loop.
Example:
Input: Take an integer N from the user (e.g., 7) Output: 0 1 1 2 3 5 8
Problem 8: Count Digits in a Number using a While Loop
Description:
Write a Java program to count the number of digits in an integer using a while loop.
Example:
Input: Take an integer num from the user (e.g., 12345) Output: Number of digits: 5
Problem 9: Palindrome Checker using a While Loop
Description:
Write a Java program that checks whether a given number is a palindrome using a while loop.
Example:
Input: Take an integer num from the user (e.g., 121) Output: 121 is a palindrome number
Problem 10: Pattern Printing using a For Loop
Description:
Write a Java program that prints a right-angled triangle pattern of stars using a for loop.
Example:
Input: Take an integer N from the user (e.g., 5) Output: * ** *** **** *****