Regular Expressions 101

Negative Lookbehind(?<!\d)

\da digit

Negative Lookahead(?!\d)

\da digit

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

(?<!\d)\d(?!\d)

New

"R3g3x"
"J4v4scr1pt"
1nício"
"Fina1"
"Dup10"
abc10xyz