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This article focuses on "how to use charAt () in javascript". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let the editor take you to learn how to use charAt () in javascript.

In javascript, the charAt () method can be used to get and return the character at the specified position, syntax "string.charAt (index)"; the parameter "index" is used to specify the position of the character in the string, which is a numeric value in the range of "0 ~ string length-1".

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

The charAt () method returns the characters at the specified position. (note: the first character position is 0, the second character position is 1, and so on. )

Syntax:

String.charAt (index)

Index: a required parameter; a number that represents a position in a string, that is, the position of a character in a string.

Return value: string type that returns the character at the specified location.

Example: returns the last character in a string

Var str = "HELLO WORLD"; var n = str.charAt (str.length-1)

Effect picture:

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