### Java Program to Check Prime Number - The Coding Shala

Home >> Java Programs >> Check Prime Number In this post, we will learn how to Check if a Given Number is a Prime Number or not in Java. Java Program to Check Prime Number A Prime Number is a number that is divisible by 1 and the number itself. For example, the number 5 is a Prime Number because it is divisible by 1 and 5 only. Note: Number 0 and 1 are not prime numbers. Example 1: Input: 7 Output: Prime Number Example 2: Input: 9 Output: Not a Prime Number Java Program: // Java program to Check Prime Number import java.util.Scanner ; public class Main { static boolean isPrime ( int num ) { if ( num < 2 ) return false ; // basic for loop ==> for(int i = 2; i < num / 2; i++ ) for ( int i = 2 ; i * i <= num ; i ++) { if ( num % i == 0 ) return false ; } return true ; } public static void main ( String [] args ) { Scanner sc = new Scanner ( System . in ); // take