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How to check whether a value is numeric or not in jQuery

Topic: JavaScript / jQueryPrev|Next

Answer: Use the jQuery.isNumeric() method

You can use the jQuery $.isNumeric() method to check whether a value is numeric or a number.

The $.isNumeric() returns true only if the argument is of type number, or if it's of type string and it can be coerced into finite numbers, otherwise it returns false. Here's an example:

  • <script type="text/javascript">
  •     // Return true (numeric)
  •     $.isNumeric("-10")
  •     $.isNumeric("0")
  •     $.isNumeric(0xFF) /* Hexadecimal notation (0xFF represents the number 255) */
  •     $.isNumeric("0xFF")
  •     $.isNumeric(+10)
  •     $.isNumeric(1.25e2) /* Exponential notation (1.25e2 represents the number 125) */
  •     $.isNumeric("1.25e2")
  •     $.isNumeric("13.417")
  •     $.isNumeric(0144)
  •     $.isNumeric(-0x56)
  •      
  •     // Return false (non-numeric)
  •     $.isNumeric("-0x52")
  •     $.isNumeric("7.2xyz")
  •     $.isNumeric("")
  •     $.isNumeric({})
  •     $.isNumeric(NaN)
  •     $.isNumeric(null)
  •     $.isNumeric(true)
  •     $.isNumeric(Infinity)
  •     $.isNumeric(undefined)
  • </script>

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