Regular Expressions 101

Pro

^start of line

Group 1([А-Я]{1}[а-яё]{1,23}|[A-Z]{1}[a-z]{1,23})

1st Alternative[А-Я]{1}[а-яё]{1,23}

Character Class[А-Я]{1}

{1}matches one character from the set below:

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

Character Class[а-яё]{1,23}

{1,23}matches between 1 and 23 characters from the set below:

а-яone character from а (1072₁₀) to я (1103₁₀) (case sensitive)

ёthe literal ё (1105₁₀ / 2121₈ / 451₁₆) (case sensitive)

2nd Alternative[A-Z]{1}[a-z]{1,23}

Character Class[A-Z]{1}

{1}matches one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[a-z]{1,23}

{1,23}matches between 1 and 23 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

$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.

25 tokens

^([А-Я]{1}[а-яё]{1,23}|[A-Z]{1}[a-z]{1,23})$

New

Иван
Иноkentiy
А
КоСтЯ
Frenk
владимир
bob