Regular Expressions 101

Pro

^start of line

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[0-9]{2}

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

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

\*{6}the literal * (42₁₀ / 52₈ / 2A₁₆) , repeated exactly 6 times

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

^0[0-9]{2}\*{6}[0-9]{2}$

# Test data
# Corrects
079******56

# Errors
079*****56
079*******56
079**-****56
79******56
709******56
0793*****56
079*****456