Regular Expressions 101

1st Alternative(?<integer>(?:[0-9](?!\d*\.))+)

Group integer(?<integer>(?:[0-9](?!\d*\.))+)

Non-Capturing Group(?:[0-9](?!\d*\.))+

+repeats the group contents below at least once:

Character Class[0-9]

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

Negative Lookahead(?!\d*\.)

\d*a digit, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative(?<float>[0-9]+[.][0-9]+)

Group float(?<float>[0-9]+[.][0-9]+)

Character Class[0-9]+

+matches at least one character from the set below:

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

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

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

3rd Alternative(?<invalid>[^\s]+)

Group invalid(?<invalid>[^\s]+)

Negated Character Class[^\s]+

+matches at least one character outside the set below:

\sany whitespace character

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

(?<integer>(?:[0-9](?!\d*\.))+)|(?<float>[0-9]+[.][0-9]+)|(?<invalid>[^\s]+)

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