Problem with methods

Hi, I need to write a simple program to input a number and display the square root of it. I need to use methods but my code does not work properly. I am also a bit confused with methods and passing parameters so could someone please explain it to me.
Here is my code:

import java.util.*;

public class SqrtMethod {
        
    static Scanner kb = new Scanner(System.in);
    
        public static int input()
        {
            System.out.println("Enter a number");
            int num = kb.nextInt();
            return num;
        }
        
        public static double FindSqrt(int num)
        {
            double sqrt = Math.sqrt(num);
            return sqrt;
        }
        
        public static void Output(double sqrt)
        {
            System.out.println("The square root is: " + sqrt);
        }
        
        public static void main(String[]args)
        {
            input();
            int num=0;
            double sqrt = FindSqrt(num);
            Output(sqrt);
        }
    }