midda25
Reputation: 160
Regex for negative and positive numbers
I need a regex for an input field to allow negative and positive numbers and no alphabet/special characters. I have seen other people achieve this but they allow the minus sign at any point in the string whereas I only want to allow the minus sign at the beginning of the string.
Note: I want to allow the user to use the arrow, del, home keys etc.
Upvotes: 2
Views: 20509
Answers (1)
Mattasse
Reputation: 1161
This the regex to get positive and negative numbers :
^-?\d+$
If you want decimal numbers you can use this :
^-?\d+(\.\d{1,2})?$
The parameter {1,2} at the end is for precision of your decimal number.
Upvotes: 5
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