toString Method (Object) (JavaScript)

Returns a string representation of an object.

Syntax


objectname.toString([radix])  

Parameters

objectname
Required. An object for which a string representation is sought.

radix
Optional. Specifies a radix for converting numeric values to strings. This value is only used for numbers.

Remarks

The toString method is a member of all built-in JavaScript objects. How it behaves depends on the object type:

Object Behavior
Array Elements of an Array are converted to strings. The resulting strings are concatenated, separated by commas.
Boolean If the Boolean value is true, returns "true". Otherwise, returns "false".
Date Returns the textual representation of the date.
Error Returns a string containing the associated error message.
Function Returns a string of the following form, where functionname is the name of the function whose toString method was called:

function functionname( ) { [native code] }
Number Returns the textual representation of the number.
String Returns the value of the String object.
Default Returns "[object objectname]", where objectname is the name of the object type.

Example

The following example illustrates the use of the toString method with a radix argument. The return value of function shown below is a Radix conversion table.

function CreateRadixTable (){  
   var s = "";  

   // Create table heading.  
   s += "Hex  Dec  Bin \n";  

   for (x = 0; x < 16; x++)  
   {  
      s += "   ";  

      // Convert to hexidecimal.  
      s += x.toString(16);  
      s += "     ";  
      if (x < 10) s += "  ";  

      // Convert to decimal.  
      s += x.toString(10);  
      s += "     ";  

      // Convert to binary.  
      s += x.toString(2);  
      s += "\n";  
   }  

   return(s);  
}  

Requirements

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

Applies To: Array Object| Boolean Object| Date Object| Error Object| Function Object| Number Object| Object Object| String Object

See Also

function Statement