Regular Expressions 101

^start of line

Negative Lookahead(?!.*are)

.*any Unicode character (except for line terminators), repeated any number of times

arethe literal text are (case sensitive)

Negative Lookahead(?!.*how)

.*any Unicode character (except for line terminators), repeated any number of times

howthe literal text how (case sensitive)

.*any Unicode character (except for line terminators), repeated any number of times

Group 1(hello)

hellothe literal text hello (case sensitive)

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

Regular Expression

^(?!.*are)(?!.*how).*(hello)

New

hello how are you
how hello are you
are hello how you
hello
are hello
how hello
bye hi hello

hello how are you
how hello are you
are hello how you
hello
are hello
how hello
bye hi hello