Regular Expressions 101

^start of line

Non-Capturing Group(?:10|[0-9](?:\.(?:[27]?5)?0*)?)

1st Alternative10

10the literal text 10

2nd Alternative[0-9](?:\.(?:[27]?5)?0*)?

Character Class[0-9]

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

Non-Capturing Group(?:\.(?:[27]?5)?0*)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[27]?5)?

?repeats the group contents below at most once:

Character Class[27]?

?matches at most one character from the set below:

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

$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.

Search reference

Regular Expression

^(?:10|[0-9](?:\.(?:[27]?5)?0*)?)$

New