What are the numerical types in javascript

The numerical types in JavaScript include string, number, Boolean, null, undefined, Symbol, object, array and function. Objects, arrays and functions are reference data types.

#The operating environment of this article: windows10 system, javascript 1.8.5, thinkpad t480 computer.

There are two types of numerical types in JavaScript: value types and reference data types.

Value type (basic type): String, Number, Boolean, Null, Undefined, Symbol.

Reference data types: Object, Array, Function.

JavaScript has dynamic typing. This means that the same variable can be used as different types.

Look at the example:

var x;               // x 为 undefined
var x = 5;           // 现在 x 为数字
var x = "John";      // 现在 x 为字符串

Related video tutorial sharing: javascript video tutorial

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