Regular Expressions 101

\ba Unicode word boundary

Character Class[a-z]

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

Character Class[*]{2}

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

*the literal * (42₁₀ / 52₈ / 2A₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Negative Lookahead(?!\d)

\da Unicode decimal digit

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

\b[a-z][*]{2}1(?!\d)

New

x**10
x**1

x**10
x**1