Arithmetic operators in Javascript

Introduction

Arithmetic operators help you do math with numbers in your program. They let you add, subtract, multiply, and divide values easily.

Calculating the total price of items in a shopping cart.

Finding the difference between two dates or times.

Increasing a score in a game after a player earns points.

Splitting a bill evenly among friends.

Converting units, like inches to centimeters.

Syntax

Javascript

result = value1 + value2;  // addition
result = value1 - value2;  // subtraction
result = value1 * value2;  // multiplication
result = value1 / value2;  // division
result = value1 % value2;  // remainder (modulus)
result = value1 ** value2; // exponentiation (power)

Use + for adding numbers or joining text (strings).

The % operator gives the remainder after division.

Examples

Adds 5 and 3 to get 8.

Javascript

let sum = 5 + 3;  // sum is 8

Subtracts 4 from 10 to get 6.

Javascript

let difference = 10 - 4;  // difference is 6

Multiplies 7 by 2 to get 14.

Javascript

let product = 7 * 2;  // product is 14

Divides 10 by 3 and gives the remainder 1.

Javascript

let remainder = 10 % 3;  // remainder is 1

Sample Program

This program shows how to use each arithmetic operator with two numbers, 12 and 5. It prints the result of each operation.

Javascript

const a = 12;
const b = 5;

console.log(`Addition: ${a} + ${b} = ${a + b}`);
console.log(`Subtraction: ${a} - ${b} = ${a - b}`);
console.log(`Multiplication: ${a} * ${b} = ${a * b}`);
console.log(`Division: ${a} / ${b} = ${a / b}`);
console.log(`Remainder: ${a} % ${b} = ${a % b}`);
console.log(`Exponentiation: ${a} ** 2 = ${a ** 2}`);

Important Notes

Division / can give decimal numbers if the division is not exact.

Exponentiation ** raises a number to the power of another number.

Remember that + can also join text, so be careful when mixing numbers and strings.

Summary

Arithmetic operators let you do basic math in your code.

Use +, -, *, /, %, and ** for addition, subtraction, multiplication, division, remainder, and power.

They help solve many everyday problems like calculating totals or splitting amounts.