Regular Expressions 101

^start of line

Character Class[\-]?

?matches at most one character from the set below:

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:\d{0,2})

\d{0,2}a digit, repeated between 0 and 2 times

Character Class[\.]?

?matches at most one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[\d]{1})

Character Class[\d]{1}

{1}matches one character from the set below:

\da digit

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^[\-]?(?:\d{0,2})[\.]?(?:[\d]{1})$

Test String
New

0.23455465
4.54656
-334343
-.34234234
234234.4234234
23123
323-312312
-12121.34344
asdasd
2312
213.3213.3213
1.4
221.4
-22.4
22
.4
1.0
99.0
-999
f.3
100.2
100
234.3
2

Regular Expression

Test StringNew

Test String
New