Usage of % in js

JavaScript’s % operator is used to calculate the remainder of two numbers. The syntax is: num1 % num2. It has a wide range of applications, including remainder finding, parity checking, cryptography, and game development.

Usage of % operator in JavaScript

In JavaScript, the % operator is used to calculate the sum of two numbers remainder. It takes two numbers as arguments and returns the remainder after dividing the first number by the second number.

Syntax:

<code>num1 % num2</code>

Where:

• num1: Dividend
• num2: Divisor

Example:

<code class="javascript">console.log(10 % 3); // 1
console.log(22 % 5); // 2
console.log(47 % 7); // 6</code>

Note:

• If the divisor is 0, an error will be raised.
• The sign of the remainder is the same as the sign of the dividend.
• If the result is a negative number, it will be inverted.

Application:

% operator is widely used in JavaScript, for example:

• Find the remainder : Calculate the remainder after dividing a number by another number, used for modular programming.
• Parity check: Check whether the number is even (remainder is 0) or odd (remainder is not 0).
• Cryptography: Used to generate hashes and encryption keys.
• Game development: Used to achieve modularization of character attributes.

Sample application:

<code class="javascript">// 奇偶性检查
function isEven(number) {
  return number % 2 === 0;
}

// 模块化编程
function getModule(number, modulus) {
  return number % modulus;
}</code>

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