Regular Expressions 101

^start of line

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\s+\d+(?:\.\d+)?)*

*repeats the group contents below any number of times:

\s+any whitespace character, repeated at least once

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\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+(?:\.\d+)?(?:\s+\d+(?:\.\d+)?)*$

New

3900 156.2 140.38 200 10
10 20 Hello
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12345.0 4.5