Prime Numbers in Range
This program prints prime numbers between 1 and 20 using nested for loop.
Problem Statement
Write a Java program that prints prime numbers between 1 and 20 using nested for loop.
Source Code
| 1 | public class PrimeRange { |
| 2 | public static void main(String[] args) { |
| 3 | for(int num=2; num<=20; num++) { |
| 4 | boolean prime = true; |
| 5 | for(int i=2; i<=num/2; i++) { |
| 6 | if(num % i == 0) { |
| 7 | prime = false; |
| 8 | break; |
| 9 | } |
| 10 | } |
| 11 | if(prime) { |
| 12 | System.out.println(num + " is prime - Eduinq"); |
| 13 | } |
| 14 | } |
| 15 | } |
| 16 | } |
Program Output
2 is prime - Eduinq 3 is prime - Eduinq 5 is prime - Eduinq 7 is prime - Eduinq 11 is prime - Eduinq 13 is prime - Eduinq 17 is prime - Eduinq 19 is prime - Eduinq
Explanation
The outer loop iterates through numbers 2 to 20. The inner loop checks divisibility of each number. If divisible, it sets prime=false. If not divisible by any, it prints prime. This demonstrates how nested loops can check prime numbers in a range. Shows how nested for loops can print prime numbers in a range.