Regular Expressions 101

Explanation

Pro

^start of line

Non-Capturing Group(?:5|[1-9]\d*[05])

1st Alternative5

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

2nd Alternative[1-9]\d*[05]

Character Class[1-9]

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

\d*a digit, repeated any number of times

Character Class[05]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

Non-Capturing Group(?:[,.][05])?

?repeats the group contents below at most once:

Character Class[,.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[05]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

$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.

26 tokens

^(?:5|[1-9]\d*[05])(?:[,.][05])?$

New