concat-method-string-javascript.md

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concat Method (String) (JavaScript) | Microsoft Docs		01/18/2017	windows-client-threshold			devlang-javascript		language-reference	concat	JavaScript TypeScript DHTML	concat method (String) Concat method	5d28ebb2-d534-4179-9297-a4c821ee9f24	14	mikejo5000	mikejo	ghogen

concat Method (String) (JavaScript)

Returns a string that contains the concatenation of two or more strings.

Syntax

  
string1. concat([string2[, string3[, . . . [, stringN]]]])  

Parameters

string1
Required. The String object or string literal to which all other specified strings are concatenated.

string2,. . ., stringN
Optional. The strings to append to the end of string1.

Remarks

The result of the concat method is equivalent to: result = string1 + string2 + string3 + stringN. A change of value in either a source or result string does not affect the value in the other string. If any of the arguments are not strings, they are first converted to strings before being concatenated to string1.

Example

The following example illustrates the use of the concat method when used with a string:

var str1 = "ABCD"  
var str2 = "EFGH";  
var str3 = "1234";  
var str4 = "5678";  
document.write(str1.concat(str2, str3, str4));  
  
// Output: "ABCDEFGH12345678"  
  

Requirements

[!INCLUDEjsv3]

Applies To: String Object

See Also

Addition Operator (+)