Regular Expressions 101

\ban ASCII word boundary

Group 1(\d{1,3}|1\d{1,3}|20[012][0-3])

1st Alternative\d{1,3}

\d{1,3}a digit, repeated between 1 and 3 times

2nd Alternative1\d{1,3}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

3rd Alternative20[012][0-3]

20the literal text 20

Character Class[012]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-3]

0-3one character from 0 (48₁₀) to 3 (51₁₀)

\ban ASCII word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

\b(\d{1,3}|1\d{1,3}|20[012][0-3])\b

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