Here is a java program to check prime number. This program is take input from user an give output as Prime or Not Prime.
Source Code:
//Java program to check prime number
import java.util.Scanner;
public class checkPrime {
public static void main(String s[]) {
Scanner sc = new Scanner(System.in);
try{
System.out.println("Enter no. to check:");
int num = sc.nextInt();
int flag = 0;
for(int i = 2; i < num; i++) {
if(num % i == 0) {
System.out.println("Not prime!");
flag = 1;
break;
}
}
if(flag == 0) {
System.out.println("Prime!");
}
}
finally {
sc.close();
}
}
}
Input & Output:
Enter no. to check:
71
Prime!