How many bytes are there in integers in JavaScript

This article mainly introduces the number of bytes of integers in JavaScript, with a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

In JavaScript, integers have 8 bytes; number memory space share is not specific to specific types, basic variable types use eight bytes of memory, and numbers and integers are stored as 64-bit floating-point numbers, that is, 8 bytes.

The operating environment of this tutorial: windows10 system, javascript1.8.5 version, Dell G3 computer.

How many bytes are there in integers in JavaScript

Let's start with the number type number.

"JavaScript number types are represented by 64-bit floating-point numbers defined by the IEEE754 standard"-excerpt from the Rhino Book

The following picture is the explanation in mdn

Note: the memory space share of number does not distinguish between specific types (Java is differentiated). Integer types (byte, short, int, long) and floating point types (float, double)

Therefore, for numbers only, the memory in the computer is 8Byte, or 8 bytes.

1byte (bytes) = 8bit (bits)

8byte = 64 bit

Extend other data types

The JavaScript basic data type occupies 8 bytes of memory in the computer.

Basic data types: string, number, undefined, boolean, null

Generally speaking, there are 2 bytes in Chinese and 1 byte in English.

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