Regular Expressions 101

Explanation
Pro

^start of line

Group 1(patient)

patientthe literal text patient (case sensitive)

Group 2(s?)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Group 3(m?e?r?g?e?)

m?optionally matches the literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

r?optionally matches the literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

g?optionally matches the literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (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.

25 tokens

^(patient)(s?)(m?e?r?g?e?)$

New

patientmer
patientsmer
patientmrg

patientgmr
patientsmrrge
patientsmerging'

patientmer
patientsmer
patientmrg

patientgmr
patientsmrrge
patientsmerging'