Regex that accepts floating point numbers and minus (-) sign
Try ^[-+]?[0-9]*[.,]?[0-9]+$
.
This regular expression will match an optional sign, that is either followed by zero or more digits followed by a dot and one or more digits (a floating point number with optional integer part), or followed by one or more digits (an integer).
Source: http://www.regular-expressions.info/floatingpoint.html - altered to work with commas as decimal separator
^[-+]?[0-9]*\.?[0-9]+$
^
- start of string[-+]?
- 0 or 1 sign indicator[0-9]*
- 0 or more integers\.
- the character.
(.
is used in regex to mean "any character")[0-9]+
- 1 or more integers$
- the end of the string
If you are instead using the comma as a decimal seperator, use ,
instead of \.
If you are using both/either, you can use [.,]