Regular Expressions 101

Pro

^start of line

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

$end of line

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

25 tokens

^-?\d+$

New

12
-12
1-2
12-
abc
1abc
abc1
a2c
-abc
abc-
a-b
-12abc
12-abc
12abc-
1.2
.12
12.
1,2
12,
,12

12
-12
1-2
12-
abc
1abc
abc1
a2c
-abc
abc-
a-b
-12abc
12-abc
12abc-
1.2
.12
12.
1,2
12,
,12