Question

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Numeric validation with RegExp to prevent invalid user input

I am new to regex. I wish to write a pattern for numeric values only (for JavaScript).

1. numeric values only.
2. allowed decimal "."
3. no commas.

Answer 1

Here is a great resource for playing around with various regular expressions in JavaScript. Your particular expression looks like this:

/^[-+]?[0-9]+(\.[0-9]+)?$/