I'm trying to figure out a regex to be used in Google Forms data validation for numbers with comma as a decimal separator.
Examples of valid entries:
123,5 ; 1 ; 0,1 ; 0,001
Examples of invalid entries:
123.5 ; [a-z] ; any characters other than numbers
I've already tried ^[1-9]\d*(,\d+)?$
but it doesn't seem to accept commas.