Regular Expressions 101

Explanation
Pro

1st Alternative3[10]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[10]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative[2][0-9]

Character Class[2]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

3rd Alternative1[8-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[8-9]

8-9one character from 8 (56₁₀) to 9 (57₁₀)

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

3[10]|[2][0-9]|1[8-9]

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