Regular Expressions 101

^start of line

Group 1(\d+)

\d+a digit, repeated at least once

Group 2(\.{2,})

\.{2,}the literal . (46₁₀ / 56₈ / 2E₁₆) , repeated at least 2 times

Group 3(\d+)

\d+a digit, repeated at least once

$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

^(\d+)(\.{2,})(\d+)$

1.2
12.12
123.123
1..1
12..23
123..123
1...1
12...12
123...123
123.........12