Regular Expressions 101

^start of line

Character Class[A-Z0-9]{18}

{18}matches exactly 18 characters from the set below:

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

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

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

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

$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

Regular Expression

^[A-Z0-9]{18}[0-9]{2}$

New

AAAAAAAAAAAAAAAAAA11
AAAAAAAAAAAAAAAAAAA1
AAAAAAAAAAAAAAAAAA1A
ABCDEFGHIJ1234567890
ABCDEFGHIJ12345678901
12345678901234567890
123456789012345678901

AAAAAAAAAAAAAAAAAA11
AAAAAAAAAAAAAAAAAAA1
AAAAAAAAAAAAAAAAAA1A
ABCDEFGHIJ1234567890
ABCDEFGHIJ12345678901
12345678901234567890
123456789012345678901