Regular Expressions 101

Pro

^start of line

Negative Lookahead(?!0*(?:\.0*)?$)

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

Non-Capturing Group(?:\.0*)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

$end of line

Non-Capturing Group(?:100(?:\.00?)?|\d?\d?(?:\.\d\d?)?)

1st Alternative100(?:\.00?)?

100the literal text 100

Non-Capturing Group(?:\.00?)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative\d?\d?(?:\.\d\d?)?

\d?optionally matches a digit

Non-Capturing Group(?:\.\d\d?)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da digit

\d?optionally matches a 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.

25 tokens

^(?!0*(?:\.0*)?$)(?:100(?:\.00?)?|\d?\d?(?:\.\d\d?)?)$

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