Core JavaScript 1.5 Reference:Global Objects:String:charAt
From MDC
Contents |
[edit] Summary
Returns the specified character from a string.
| Method of String | |
| Implemented in: | JavaScript 1.0, NES2.0 |
| ECMA Version: | ECMA-262 |
[edit] Syntax
charAt(index)
[edit] Parameters
-
index - An integer between 0 and 1 less than the length of the string.
[edit] Description
Characters in a string are indexed from left to right. The index of the first character is 0, and the index of the last character in a string called stringName is stringName.length - 1. If the index you supply is out of range, JavaScript returns an empty string.
[edit] Examples
[edit] Example: Displaying characters at different locations in a string
The following example displays characters at different locations in the string "Brave new world":
var anyString="Brave new world"
document.writeln("The character at index 0 is '" + anyString.charAt(0) + "'")
document.writeln("The character at index 1 is '" + anyString.charAt(1) + "'")
document.writeln("The character at index 2 is '" + anyString.charAt(2) + "'")
document.writeln("The character at index 3 is '" + anyString.charAt(3) + "'")
document.writeln("The character at index 4 is '" + anyString.charAt(4) + "'")
document.writeln("The character at index 999 is '" + anyString.charAt(999) + "'")
These lines display the following:
The character at index 0 is 'B' The character at index 1 is 'r' The character at index 2 is 'a' The character at index 3 is 'v' The character at index 4 is 'e' The character at index 999 is ''