Java Program To Check a Number is Prime or Composite

By | July 2, 2019
Task:Write a Java Program To Check a Number is Prime or Composite

The Source code for Java Program to input a number and check whether it is prime number or composite

/*
 Write a Java program to input a number
 and check it whether it is prime
 or composite number.
 */
package primenocheck;
/**
 * @author EasyCodeBook.com
 */
import java.util.Scanner;
public class PrimeNoCheck {

public static void main(String[] args) {
int number ;
Scanner input = new Scanner(System.in);
System.out.print("Enter a number:");
number = input.nextInt();
boolean isPrime = true;
for(int i = 2; i <= number/2; i++)
{
// condition for nonprime number
if(number % i == 0)
{
isPrime = false;
break;
}
}
if (isPrime==true)
System.out.println(number + " is a Prime number.");
else
System.out.println(number + " is not a Prime number\n(it is a Composite number.)");
}
} 
     

Sample Run and Output of Java Program Check for Prime Number

Enter a number:12
12 is not a Prime number
(it is a Composite number.)

Java Program To Check a Number is Prime or Composite

Java Program To Check a Number is Prime or Composite

Leave a Reply

Your email address will not be published. Required fields are marked *