Regular Expressions 101

^start of line

aathe literal text aa (case sensitive)

Non-Capturing Group(?:aa)*

*repeats the group contents below any number of times:

aathe literal text aa (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Non-Capturing Group(?:bbb)*

*repeats the group contents below any number of times:

bbbthe literal text bbb (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.

Search reference

Regular Expression

^aa(?:aa)*b(?:bbb)*$

New

a
b
ab
aab
abb
aaab
aabb
abbb
aaaab
aaabb
aabbb
abbbb
aaaaab
aaaabb
aaabbb
aabbbb
abbbbb
aaaaaab
aaaaabb
aaaabbb
aaabbbb
aabbbbb
abbbbbb
aaaabbbb