substring-method-string-javascript.md

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substring Method (String) (JavaScript) | Microsoft Docs		01/18/2017	windows-client-threshold			devlang-javascript		language-reference	substring	JavaScript TypeScript DHTML	substrings substring method	9cf9a005-cbe3-42fd-828b-57a39f54224c	18	mikejo5000	mikejo	ghogen

substring Method (String) (JavaScript)

Returns the substring at the specified location within a String object.

Syntax

  
      strVariable. substring(start [, end])  
"String Literal".substring(start [, end])   

Parameters

start
Required. The zero-based index integer indicating the beginning of the substring.

end
Optional. The zero-based index integer indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.

If end is omitted, the characters from start through the end of the original string are returned.

Remarks

The substring method returns a string containing the substring from start up to, but not including, end.

The substring method uses the lower value of start and end as the beginning point of the substring. For example, strvar.substring(0, 3**)** and strvar.substring(3, 0) return the same substring.

If either start or end is NaN or negative, it is replaced with zero.

The length of the substring is equal to the absolute value of the difference between start and end. For example, the length of the substring returned in strvar.substring(0, 3) and strvar.substring(3, 0) is three.

Example

The following example illustrates the use of the substring method.

var s = "The quick brown fox jumps over the lazy dog.";  
var ss = s.substring(10, 15);  
document.write(ss);  
  
// Output:  
// brown  
  

Requirements

[!INCLUDEjsv1]

See Also

substr Method (String)