Java Arithmetic Operators Example

This post describes arithmetic operators in Java programming language, their syntax and how to use them with examples.

Java Arithmetic Operators

Arithmetic operators are used in mathematical expressions in the same way that they are used in algebra. 

The following table lists the arithmetic operators:

Java Arithmetic Operators Example

The basic arithmetic operations — addition, subtraction, multiplication, and division — all behave as you would expect for all numeric types. The unary minus operator negates its single operand.

The following simple example program demonstrates the arithmetic operators. It also illustrates the difference between floating-point division and integer division.

package net.javaguides.corejava.operators.arithmetic;

public class BasicMath {
    public static void main(String args[]) {
        // arithmetic using integers
        System.out.println("Integer Arithmetic");
        int a = 1 + 1;
        int b = a * 3;
        int c = b / 4;
        int d = c - a;
        int e = -d;
        System.out.println("a = " + a);
        System.out.println("b = " + b);
        System.out.println("c = " + c);
        System.out.println("d = " + d);
        System.out.println("e = " + e);
        // arithmetic using doubles
        System.out.println("\nFloating Point Arithmetic");
        double da = 1 + 1;
        double db = da * 3;
        double dc = db / 4;
        double dd = dc - a;
        double de = -dd;
        System.out.println("da = " + da);
        System.out.println("db = " + db);
        System.out.println("dc = " + dc);
        System.out.println("dd = " + dd);
        System.out.println("de = " + de);
    }
}

Output:

Integer Arithmetic
a = 2
b = 6
c = 1
d = -1
e = 1

Floating Point Arithmetic
da = 2.0
db = 6.0
dc = 1.5
dd = -0.5
de = 0.5

Let's see one more example, the following program, ArithmeticDemo, tests the arithmetic operators.

class ArithmeticDemo {

    public static void main(String[] args) {

        int result = 1 + 2;
        // result is now 3
        System.out.println("1 + 2 = " + result);
        int original_result = result;

        result = result - 1;
        // result is now 2
        System.out.println(original_result + " - 1 = " + result);
        original_result = result;

        result = result * 2;
        // result is now 4
        System.out.println(original_result + " * 2 = " + result);
        original_result = result;

        result = result / 2;
        // result is now 2
        System.out.println(original_result + " / 2 = " + result);
        original_result = result;

        result = result + 8;
        // result is now 10
        System.out.println(original_result + " + 8 = " + result);
        original_result = result;

        result = result % 7;
        // result is now 3
        System.out.println(original_result + " % 7 = " + result);
    }
}

This program prints the following:

1 + 2 = 3
3 - 1 = 2
2 * 2 = 4
4 / 2 = 2
2 + 8 = 10
10 % 7 = 3

Reference

https://www.javaguides.net/2018/10/arithmetic-operators-in-java-with.html