Write a program to find the GCD and LCM of a number

import java.util.Scanner;
public class Gcd_Lcm
{
    public static void main(String [] args)
    {
        Scanner input = new Scanner(System.in);
        System.out.println(" Enter num1");
        int num1 = input.nextInt();
        System.out.println(" Enter num2");   
        int num2 = input.nextInt();
        int gcd=1;
        int k = 2;
        while(k<num1 && k< num2)
{
        if(num1%k ==0 && num2%k==0)
            {
             gcd =k;           
            }
            k++;
       }
System.out.println("gcd of the given number ="+gcd);
System.out.println("lcm of the given number =" + (num1*num2)/gcd);   
}
}