Question

Java. I am having a hard time figuring out how to take user input and then write a method that returns the answer. All the examples I find have numbers hard coded. Can you show me how this is done. For example, maybe add two numbers. Thank you

Answer 1

Solution:

I am using Scanner class to get the input. We use following methods to get user input:
1) public String nextLine(): For getting input String
2) public int nextInt(): For integer input
3) public float nextFloat(): For float input

Now as per your demand, I am writing the code for the addition of two numbers.

First we need to import the package java.util to access the Scanner class's functionality.

Complete code is as follows:

import java.util.*;

class Main

{

//function that calculate the sum of two integers that are given by the user

public static int sum()

{

//create object of Scanner class where in is a identifier

Scanner in = new Scanner(System.in);

//take first user input

System.out.print("Input first integer: ");

int first = in.nextInt();

//take second user input

System.out.print("Input second integer: ");

int second = in.nextInt();

//perform addition

int result = first + second;

//returns the answer

return result;

}

//main function

public static void main(String[] args)

{

//call the function sum

System.out.println("The sum is: "+sum());

}

}

Output:

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