Regular Expressions 101

^start of line

Positive Lookahead(?=.*\d)

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

\da digit

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

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

Character Class[a-z]

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

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

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

Character Class[A-Z]

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

Positive Lookahead(?=.*[@#$%^&+=])

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

Character Class[@#$%^&+=]

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Negated Character Class[^\s]{8,}

{8,}matches at least 8 characters outside the set below:

\sany whitespace character

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])[^\s]{8,}$

123456789aA@
1234567
123456789A@
123456789a@
123456789aA
asdasdasd1A#

\1 \2 \1/\3*100