Regular Expressions 101

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

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

1st Alternative\.\d+

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

2nd Alternative — matches an empty string

Positive Lookahead(?=\s*р\.?\s+START:)

\s*any whitespace character, repeated any number of times

рthe literal р (1088₁₀ / 2100₈ / 440₁₆) (case sensitive)

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

\s+any whitespace character, repeated at least once

START:the literal text START: (case sensitive)

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*р\.?\s+START:)

Test String
New

Ваш баланс: -540.20 р.
START: кино и сериалы за 249.222 р./мес. Первые 14 дней - за 0 р: *214#

-540.20 р.
START: кино и сериалы за 249.222 р./мес. Первые 14 дней - за 0 р: *214#

-560р
START: кино и сериалы за 249.222 р./мес. Первые 14 дней - за 0 р: *214#

Regular Expression

Test StringNew

Test String
New