Regular Expressions 101

^start of line

Character Class[A-Z]

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

Negated Character Class[^\d]{10,30}

{10,30}matches between 10 and 30 characters outside the set below:

\da digit

\.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

^[A-Z][^\d]{10,30}\.$

New

This is a good string.
this, not so good.
I'm an okay string.
um, 3 things wrong here!
I'm. A. Good. String.