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Microsoft® JScript™
parseInt Method
 Language Reference 
Version 1 

See Also                  Applies To


Description
Converts strings into integers.
Syntax
parseInt(numstring, [radix])

The parseInt method syntax has these parts:

Part Description
numstring Required. A string to convert into a number.
radix Optional. A value between 2 and 36 indicating the base of the number contained in numstring. If not supplied, strings with a prefix of '0x' are considered hexidecimal and strings with a prefix of '0' are considered octal. All other strings are considered decimal.
Remarks
The parseInt method returns an integer value equal to the number contained in numstring. If no prefix of numstring can be successfully parsed into an integer, NaN (not a number) is returned.
parseInt("abc")    // Returns NaN.
parseInt("12abc")  // Returns 12.

You can test for NaN using the isNaN method.

The uniary minus and plus operators will also convert a string to a number. E.g. var a = + "123" results in a numeric 123 in a.

  <SCRIPT>
  <!--
  var a = "123";
  var b = +a;
  document.write("<PRE>");
  document.write("<BR>a is "+a+" and is a "+typeof(a));
  document.write("<BR>b is "+b+" and is a "+typeof(b));
  document.write("</PRE>");
  // --> </SCRIPT>

See also:


file: /Techref/inet/iis/jscript/htm/js421.htm, 3KB, , updated: 2008/1/31 03:41, local time: 2017/11/22 04:35,
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