Regular Expressions 101

Pro

^start of string

Positive Lookahead(?=\D*\d)

\D*any character that's not a digit, repeated any number of times

\da digit

Positive Lookahead(?=[^a-z]*[a-z])

Negated Character Class[^a-z]*

*matches any number of characters outside the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Positive Lookahead(?=[^A-Z]*[A-Z])

Negated Character Class[^A-Z]*

*matches any number of characters outside the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[a-zA-Z\d$*%!.,^]{8,40}

{8,40}matches between 8 and 40 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

$the literal $ (36₁₀ / 44₈ / 24₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

$end of string

Detailed match information will be displayed here automatically.

26 tokens

^(?=\D*\d)(?=[^a-z]*[a-z])(?=[^A-Z]*[A-Z])[a-zA-Z\d$*%!.,^]{8,40}$

abcdef5T