Regular Expressions 101

Pro

^start of line

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

Group 1(\d)

\da digit

Character Class[A-Za-z\s\.]?

?matches at most one character from the set below:

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

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

\sany whitespace character

\.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.

25 tokens

^y(\d)[A-Za-z\s\.]?$

New

y0
y1
y2
y3
y4
y5
y6
y7
y8
y9
y11
y23
y345
y1 
y7a

y0
y1
y2
y3
y4
y5
y6
y7
y8
y9
y11
y23
y345
y1 
y7a