Regular Expressions 101

Pro

roll the literal text roll (case insensitive)

Group 1(\d+)

\d+a digit, repeated at least once

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case insensitive)

Group 2(\d+)

\d+a digit, repeated at least once

Group 3([\+-]\d+)?

?repeats the group contents below at most once:

Character Class[\+-]

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

$end of string, or before its final line terminator

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

roll (\d+)d(\d+)([\+-]\d+)?$

New

roll 1d10
roll 1d100
roll 1d20
roll 1d1234
roll 1d20+1
roll 1d20-1
roll 1d20*1
roll 1d20a1

roll 1d10
roll 1d100
roll 1d20
roll 1d1234
roll 1d20+1
roll 1d20-1
roll 1d20*1
roll 1d20a1