Regular Expressions 101

Pro

^start of line

Group 1([5-9]|\d\d|[1-4]\d\d|5[0-4]\d|55[0-5])

1st Alternative[5-9]

Character Class[5-9]

5-9one character from 5 (53₁₀) to 9 (57₁₀)

2nd Alternative\d\d

\da digit

3rd Alternative[1-4]\d\d

Character Class[1-4]

1-4one character from 1 (49₁₀) to 4 (52₁₀)

\da digit

4th Alternative5[0-4]\d

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

5th Alternative55[0-5]

55the literal text 55

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

$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

^([5-9]|\d\d|[1-4]\d\d|5[0-4]\d|55[0-5])$

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