Regular Expressions 101

^start of line

Negated Character Class[^BC\n]*

*matches any number of characters outside the set below:

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Cthe literal C (67₁₀ / 103₈ / 43₁₆) (case sensitive)

\na line-feed (newline) character (ASCII 10)

Athe literal A (65₁₀ / 101₈ / 41₁₆) (case sensitive)

Negated Character Class[^BC\n]*

*matches any number of characters outside the set below:

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Cthe literal C (67₁₀ / 103₈ / 43₁₆) (case sensitive)

\na line-feed (newline) character (ASCII 10)

$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

Regular Expression

^[^BC\n]*A[^BC\n]*$

New

This is A test for B or C.
This is A test for D or E.
This is Atest for F
A

BBCCCCa
BBCCCCA
bbbbcccA

This is A test for B or C.
This is A test for D or E.
This is Atest for F
A

BBCCCCa
BBCCCCA
bbbbcccA