How do I properly use the hasNextInt method as an if statement logical statement

I'm a beginner at java and there's something puzzling me about my code, In the assignment i'm supposed to, as the assignment requests: "Make sure the user has entered a valid integer value. Write an if() statement as follows: Use the Scanner hasNextInt() method in the logical expression to get a Boolean value" but whenever I insert the Input(Scanner name).hasNextInt as the if statements logical expression my console does not print the factorial. What im a supposed to do in order to be able to use the hasNextInt method properly.

import java.util.Scanner;

public class Factorials {

public static void main(String[] args) {
    // TODO Auto-generated method stub

    //1. create variables
    int num = 0;
    
    //2. Input prompt 
    Scanner Input = new Scanner(System.in);
    System.out.print("Please enter a number that is an integer: ");
    num = Input.nextInt();
    
     if (Input.hasNextInt()) { 
            
            long fact = 1;
            for (int i = 2; i <= num; i++) {
                fact = fact * i;
            }
            System.out.println("");
            System.out.println("The factorial of "+num+" is: "+fact);
            
            
            Input.close();
            return;
     }
        else {
        
        System.out.println("The text you entered was either not a number or is not an integer, please try again.");
        
        Input.close();
        return;
        }// end of if

}// end of main

}// end of class