Regular Expressions 101

^start of line

Negative Lookahead(?!0+$)

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

$end of line

Character Class[0-9]{1,10}

{1,10}matches between 1 and 10 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$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.

Search reference

Regular Expression

^(?!0+$)[0-9]{1,10}$

New

0
1
000
12
123
1234
12345
123456
1234567
12345678
123456789
1234567890
12345678901