Regular Expressions 101

1st Alternative^\d+(?=\sis)

^start of line

\d+a digit, repeated at least once

Positive Lookahead(?=\sis)

\sany whitespace character

isthe literal text is (case sensitive)

2nd Alternative(?<=is\s)\d+\.?$

Positive Lookbehind(?<=is\s)

isthe literal text is (case sensitive)

\sany whitespace character

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

$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+(?=\sis)|(?<=is\s)\d+\.?$

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