Regular Expressions 101

1st Alternative^(?:((\d+(?=[^.]+|\.{2,})).)+|(\d\.){2,}).*

^start of line

Non-Capturing Group(?:((\d+(?=[^.]+|\.{2,})).)+|(\d\.){2,})

1st Alternative((\d+(?=[^.]+|\.{2,})).)+

Group 1((\d+(?=[^.]+|\.{2,})).)+

+repeats the group contents below at least once:

Group 2(\d+(?=[^.]+|\.{2,}))

\d+a Unicode decimal digit, repeated at least once

Positive Lookahead(?=[^.]+|\.{2,})

1st Alternative[^.]+

Negated Character Class[^.]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative\.{2,}

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

.any Unicode character (except for line terminators)

2nd Alternative(\d\.){2,}

Group 3(\d\.){2,}

{2,}repeats the group contents below at least 2 times:

\da Unicode decimal digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

.*any Unicode character (except for line terminators), repeated any number of times

2nd Alternative[^\d]+$

Negated Character Class[^\d]+

+matches at least one character outside the set below:

\da Unicode decimal digit

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:((\d+(?=[^.]+|\.{2,})).)+|(\d\.){2,}).*|[^\d]+$

New

1

1.7654

-2.5

2-

2...33

m

2..3

2....233..6

2.2.8

2--5

6-4-9