How to convert binary to hexadecimal in JavaScript

Conversion method: First use the parseInt() function to convert binary to decimal, the syntax is "parseInt(string,2);"; then use the toString() function to convert decimal to hexadecimal, the syntax is Format "number.toString(16)".

The operating environment of this tutorial: Windows 7 system, ECMAScript version 5, Dell G3 computer.

How to convert binary to hexadecimal in JavaScript

var a=100;
var b=parseInt(a,2);
b.toString(16)

Introduction to related functions:

The parseInt() function parses a string and returns an integer.

When the value of parameter radix is ​​0, or the parameter is not set, parseInt() will determine the base of the number based on string.

When the parameter radix is ​​omitted, JavaScript defaults to the radix of numbers as follows:

• If the string starts with "0x", parseInt() will parse the rest of the string into ten Hexadecimal integer.

• If string starts with 0, then ECMAScript v3 allows an implementation of parseInt() to parse the following characters as octal or hexadecimal digits.

• If string starts with a number from 1 to 9, parseInt() will parse it into a decimal integer.

Syntax

parseInt(string, radix)

toString() function can convert a Number object into a string and return the result.

Grammar

number.toString(radix)

Base conversion:

1. Decimal and binary, octal and hexadecimal System conversion

var a=11

1. Convert decimal to binary

a.toString(2)

2. Convert decimal to octal

a.toString(8)

3. Convert decimal to hexadecimal

a.toString(16)

2. Binary, octal, hexadecimal and decimal conversion

1. Binary to decimal

var b=100;
parseInt(b,2);

2. Octal to decimal

var c=100;
parseInt(c,8);

3. Hexadecimal to decimal

var d=100;
parseInt(d,16);

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