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decimal seperator is a dot, followed by max one digit! No range specified.
Thanks guys!
763
$ means "Match the end of the string" (the position after the last character in the string). Both are called anchors and ensure that the entire string is matched instead of just a substring.
A regex (regular expression) consists of a sequence of sub-expressions. In this example, [0-9] and + . The [...] , known as character class (or bracket list), encloses a list of characters. It matches any SINGLE character in the list.
A regex pattern matches a target string. The pattern is composed of a sequence of atoms. An atom is a single point within the regex pattern which it tries to match to the target string. The simplest atom is a literal, but grouping parts of the pattern to match an atom will require using ( ) as metacharacters.
^-?\d+(\.\d)?$
if the decimal part is optional, and
^-?\d+\.\d$
if it's required :)
183
Simple: -?\d+\.\d
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