JavaScript Arithmetic Assignment Operators: A Quick Guide

Arithmetic assignment operators are shorthand operators in JavaScript that combine arithmetic operations and assignments in a single step.

Suppose you want to increase the value of a variable by 1:

let i = 10;
i = i + 1;

console.log(i); // Output: 11

This code adds 1 to the value of i and assigns the updated value back to the i variable.

In such cases, you can use arithmetic assignment operators to make the operation clearer and more concise:

let i = 10;

// Equivalent to: i = i + 1
i += 1;

console.log(i); // Output: 11

Here, the += operator adds 1 to the variable i and updates its value.

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Arithmetic Assignment Operators

JavaScript supports arithmetic assignment operators for all standard arithmetic operators. Here's the summary:

Let's see some of these operators in practice.

Example: Subtraction with -= Operator

let total = 100;
let discount = 20;

total -= discount;

console.log(total); // Output: 80

Example: Division with /= Operator

let number = 1000.0;
let divisor = 5;

number /= divisor;
number /= divisor;

console.log(number); // Output: 40.0

Now, try using arithmetic assignment operators in your code to make basic operations more concise and readable!