In this tutorial, we are going to write a Java program to check whether a given number is a prime number or not in Java Programming with practical program code and step-by-step full complete explanation.
Java program to check prime number
import java.util.Scanner;
public class PrimeNumber{
public static void main(String args[]){
Scanner scanner = new Scanner(System.in);
int number, m, flag=0;
// Enter number
System.out.print("Enter number = ");
number = scanner.nextInt();
m = number/2;
if(number == 0 || number == 1){
System.out.print(number +" is not prime number");
} else {
for(int i = 2; i <= m; i++){
if(number % i == 0){
System.out.println(number +" is not prime number");
flag = 1;
break;
}
}
if(flag == 0){
System.out.println(number +" is prime number");
}
}
}
}
Output
Enter number = 8 8 is not prime number
