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Check number validation in javascript
Find decimal value in javascript!
A number containing decimal(.) is known as a decimal number. A number comes between the two whole numbers, called decimal numbers. We use decimal numbers in calculations, progress bars, to accept input in forms, etc.
A regular expression is a well-known entity for validation purposes.
Get decimal part of a number javascriptA Regular expression is a search pattern of characters with a specific meaning used to validate the data. It can be used for any string or number.
We have used the indexOf() method in the if statement to validate the data.
- Using the match() method
- Using regular expression
Validate Decimal Number Using the match() Method
It retrieves the matches when matching a string against a regular expression.
Syntax
str.match( re );Here str is the number in string form and re is the regular exression to validate the number in the string str.
Example
You can try to run the following code to validate decimal numbers.
<html><body><script>var str ="1.5";var re =/^[-+]?[0-9]+\.[0-9]+$/;var found = str.match( re ); document.write("decimal");</script></body></html&
- regular expression to validate decimal number in javascript
- how to validate decimal number in java