Regular Expressions 101

Explanation
Pro

^start of line

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Group 1(([0-5]\d{2})|([6-8](([1][9])|([2-9]\d)))|([9](([2][1-9])|[3-9]\d)))

1st Alternative([0-5]\d{2})

Group 2([0-5]\d{2})

Character Class[0-5]

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

\d{2}a digit, repeated exactly 2 times

2nd Alternative([6-8](([1][9])|([2-9]\d)))

Group 3([6-8](([1][9])|([2-9]\d)))

Character Class[6-8]

6-8one character from 6 (54₁₀) to 8 (56₁₀)

Group 4(([1][9])|([2-9]\d))

1st Alternative([1][9])

Group 5([1][9])

Character Class[1]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[9]

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

2nd Alternative([2-9]\d)

Group 6([2-9]\d)

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

\da digit

3rd Alternative([9](([2][1-9])|[3-9]\d))

Group 7([9](([2][1-9])|[3-9]\d))

Character Class[9]

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

Group 8(([2][1-9])|[3-9]\d)

1st Alternative([2][1-9])

Group 9([2][1-9])

Character Class[2]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative[3-9]\d

Character Class[3-9]

3-9one character from 3 (51₁₀) to 9 (57₁₀)

\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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^2(([0-5]\d{2})|([6-8](([1][9])|([2-9]\d)))|([9](([2][1-9])|[3-9]\d)))$

New

Extraction