Basic Math Calculator Java Program

In this Java tutorial, we will review some of the basics of building a Java program such as class Main and public static void main. This Java tutorial will cover three Java program exercises as listed below:

• Exercise 1: Math Basics
• Exercise 2: Math Input Calculator

Exercise 1: Math Basics

In this first exercise, we will write a Java program to print the values of addition, subtraction, multiplication, division and modulus.

Input:

public class Main {
 
 public static void main(String[] args) {
  System.out.println("Addition 5 + 4");
  System.out.println(5 + 4);
  System.out.println("\nSubtraction 9 - 7");
  System.out.println(9 - 7);
  System.out.println("\nMultiplication 4 * 10");
  System.out.println(4 * 10);
  System.out.println("\nDivision 8 / 4");
  System.out.println(8 / 4);
  System.out.println("\nModulus 8 % 4");
  System.out.println(8 % 4);
 }
 
}

Output:

Addition 5 + 4
9
Subtraction 9 - 7
2
Multiplication 4 * 10
40
Division 8 / 4
2
Modulus 8 % 4
0

Exercise 2: Math Input Calculator

In this second exercise, we will write a Java program to print the values of addition, subtraction, multiplication, division and modulus with the users input of the first and second numbers into the Java program.

Input:

import java.util.Scanner;
public class Main {
  public static void main(String[] args) 
  {
    Scanner input = new Scanner (System.in);
    System.out.print("Input the first number: ");
    int a = input.nextInt();
    System.out.print("Input the second number: ");
    int b = input.nextInt();
    int add = (a + b);
    int sub = (a - b);
    int mul = (a * b);
    int div = (a / b);
    int mod = (a % b);
    System.out.println();
    
  System.out.println("Addition: " + add);
  System.out.println("\nSubtraction: " + sub);
  System.out.println("\nMultiplication: " + mul);
  System.out.println("\nDivision: " + div);
  System.out.println("\nModulus: " + mod);
  }
}

Output:

Input the first number:  5
Input the second number:  6
Addition: 11
Subtraction: -1
Multiplication: 30
Division: 0
Modulus: 5

I hope this Java tutorial helped to provide the basic knowledge of building a calculator in Java.