Regex for float number with length 5 and , or . separators

Question

I want to build a regular expression for float number with maximum Length 5. My number can have separator ',' or '.' or it can be a natural number (not float)

I Want to allow any of this values

    XXXXX
    XXXX.X
    XXX.XX
    XX.XXX
    X.XXXX
    X.X
    X.XX
    X.XXX
    X.XXXX
    XX.X
    XXX.X
    etc.

Answer 1

Simple method:

^\d{1,5}$|^(?=\d+[.,]\d+$).{3,6}$

Debuggex Demo