Regular Expressions 101

Pro

^start of line

Group 1(0\.(?!00)|(?!0)\d+\.)

1st Alternative0\.(?!00)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!00)

00the literal text 00

2nd Alternative(?!0)\d+\.

Negative Lookahead(?!0)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da digit

$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.

26 tokens

^(0\.(?!00)|(?!0)\d+\.)\d\d$

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