What is the random number function in js

The random number function Math.random() in JavaScript generates a random number between 0 and 1. Other uses include: Random number within the specified range: Math.random() * (max - min) min generates an integer random number: Math.floor(Math.random() * (max - min 1)) min generates a specified number of random numbers: uses a loop to generate a specified number of random numbers

Random number function in JS

JavaScript provides a function named Math.random() for generating A random number between 0 (inclusive) and 1 (exclusive).

Usage:

<code class="javascript">const randomNumber = Math.random();</code>

Notes:

• The random numbers generated are all floating point numbers.
• Each call to Math.random() will generate a new random number.
• Although the generated random numbers look random, they are actually generated based on a pseudo-random number generation algorithm.
• For situations where truly random numbers are required (such as cryptography), the Math.random() function should not be used.

Extended usage:

Random numbers within the specified range:

<code class="javascript">// 生成 [min, max] 范围内的随机数
const randomNumber = Math.random() * (max - min) + min;</code>

Generate random integers Number:

<code class="javascript">// 生成 [min, max] 范围内的随机整数
const randomNumber = Math.floor(Math.random() * (max - min + 1)) + min;</code>

Generate the specified number of random numbers:

<code class="javascript">// 生成 count 个随机数，范围为 [min, max]
const randomNumbers = [];
for (let i = 0; i < count; i++) {
  randomNumbers.push(Math.random() * (max - min) + min);
}</code>

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