Regular Expressions 101

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

.*any Unicode 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)

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

Positive Lookahead(?=.*[0-9].*)

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

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

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

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

.*any Unicode 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)

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

^start of line

Character Class[a-zA-z]

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

A-zone character from A (65₁₀) to z (122₁₀) (case sensitive)

Character Class[a-zA-Z0-9]*

*matches any number of 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)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[@!#+-]

@the literal @ (64₁₀ / 100₈ / 40₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$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.

Search reference

Regular Expression

(?=.*[A-Z].*)(?=.*[0-9].*)(?=.*[a-z].*)^[a-zA-z][a-zA-Z0-9]*[@!#+-]$

New

Xyz1325@
is valid.
aBcd123xYz#
is also valid.
@Xyz1234
is invalid.
1234Xyz@
is invalid.
Xyz@
is invalid