To get a string contains only numbers (0-9) we use a regular expression (/^[0-9] $/) which allows only numbers.
If ANSI_NULLS is turned on (the default), the IS NULL operator must be used in expressions when testing for null values. Write Line(" Two nulls=", String Equals(a, b)) ' Make them empty strings.
However, you can't prevent different connections from setting null options for that connection.
Client side validations become very important when submitting data on a web page. We have an input box and it must accept only numbers, and it should not allow other characters as input.
Here, in this post I'll show you an example on how to enter only numbers or allow only numbers with a decimal in a textbox using Java Script. Ascci stands for “American Standard Code for Information Interchange”.