Regular Expressions 101

Non-Capturing Group(?:\s|^)

1st Alternative\s

\sany whitespace character

2nd Alternative^

^start of line

Group 1(\d+)

\d+a digit, repeated at least once

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

(?:\s|^)(\d+)

New

2 burgers and 3 drinks would be $15
The cost of 2 burgers and 3 drinks are $15 test12test