Check string is numeric in Javascript
| Script version: | 1.0 |
| Language: | Javascript |
| Rating: |  |
| Category: | Strings |
| Description: | Functions to check whether a string is a valid number. Can be used for phone number verification, or long digit varification. This function can handle larger numbers, however, it will return false if the string is not a whole number, ie. isInteger("1.5") will return false. You can also uncomment line 11 in the code below to return false if a number has leading zeros - ie isInteger("00123") will return false if this line is uncommented. |
| Instructions: | Pass in a string to the function like this: myString = "123456789012345678" if (isInteger(myString)){ alert('sting is numeric') } else { alert('string is not a number') } |
| Code: | |
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