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The number Type - Variables & Data Types | JavaScript | Repovive

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JavaScript22 sections · 783 units18h total

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The number Type

All numbers are the same

JavaScript has just one number type. Unlike C++ with int, float, and double, JavaScript treats all numbers the same:

let integer = 42
let decimal = 3.14
let negative = -17
let scientific = 2.5e6  // 2,500,000

This simplicity has a tradeoff. Numbers use $64$ -bit floating point, which can cause precision issues with large integers or certain decimals like $0.1 + 0.2$ .