Regular Expressions 101

Explanation

Pro

^start of line

Negative Lookahead(?!0)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\d+a Unicode decimal digit, repeated at least once

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^(?!0)\d+

New

0123
123
-1234
0
1234

--0.0
00000.0
5525.225.2225500055..22555.005555.01445551
22.22.22.22.22.222.02..022.22.2
2.000000
-0.22
-1021.00122
-11001100.000220
-8.50.5555-2250.25266
-002
-0.0002200
-0.000021

Substitution

0123
123
-1234
0
1234

--0.0
00000.0
5525.225.2225500055..22555.005555.01445551
22.22.22.22.22.222.02..022.22.2
2.000000
-0.22
-1021.00122
-11001100.000220
-8.50.5555-2250.25266
-002
-0.0002200
-0.000021