write a java program to input a number and test if it is a prime number

Today We will create a java program to take input of number and check weather it is a prime number or not using java So Lets Get Started

import java.util.Scanner; 


public class Prime {

public static void main(String[] args) {

int number;

Scanner sc=new Scanner(System.in);
System.out.print("Enter number: "); 

number=sc.nextInt();

int n=2, mid=number/2;

boolean primetest = true;

do {

if (number % n == 0) {
    
System.out.println("A factor "+n+" of "+number+" found!");
System.out.println("Hence NOT a prime number11");

primetest=false;
break;

}
n++;
}
 while(n<=mid);
if(primetest==true){
System.out.println(number+" is a Prime Number");
}
}}

Explaining The Above Program Step By Step

• Firstly import scanner class to take input
• then I have created a class
• After that created a main function
• Create a variable number
• Create scanner object to take input
• Then i have printed Enter number
• After that i have checked the number is prime or not using do while loop

Today we have learned how to input a number and test if it is a prime number

Thank You