Here you will get java program for prime number.
A number is said to be prime number if it is only divisible by 1 or itself. For example 2, 3, 5, 11, 13, etc are prime numbers.
We can check a number is prime or not by following method.
If all the numbers between 2 to n/2 doesn’t divide n completely then n is prime otherwise not.
Java Program for Prime Number
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import java.util.Scanner; public class PrimeNumberJava { public static void main(String args[]){ int n, i, flag = 1; Scanner sc = new Scanner(System.in); System.out.println("enter a number: "); n = sc.nextInt(); for(i = 2; i <= n/2; ++i){ if(n%i == 0){ flag = 0; break; } } if(flag == 1){ System.out.println("prime number"); } else{ System.out.println("not prime number"); } } } |
Output
enter a number:
11
prime number
