Regular Expressions 101

\ban ASCII word boundary

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

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Character Class[24680]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\ban ASCII word boundary

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.

Search reference

Regular Expression

\b(?:\d+)?[24680]\b

New

1 12 23 34 45 56 67 78 89 90 21 13 24 35 46 57 68 79 80 123 234 345 456 567 678 789 890 2 4 6 8 0