Regular Expressions 101

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

eduthe literal text edu (case sensitive)

Non-Capturing Group(?:\.\w{2,3})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{2,3}any word character, repeated between 2 and 3 times

$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

\.edu(?:\.\w{2,3})?$

New

.xx
school.edu.au
college.edu.uk
.edu
school.edu
student.college.edu