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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.
Let's take a look at the following example to understand how it basically works:
Example
Try this code »<script>
// 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>Related FAQ
Here are some more FAQ related to this topic:
- How to check if a variable exists or defined in JavaScript
- How to sort an array of integers correctly in JavaScript
- How to check for an empty string in JavaScript
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