Regular Expressions 101

Pro

^start of line

\wany word character

Non-Capturing Group(?:\s[+*]\s\w)+

+repeats the group contents below at least once:

\sany whitespace character

Character Class[+*]

+the literal + (43₁₀ / 53₈ / 2B₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

\sany whitespace character

\wany word character

$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.

26 tokens

^\w(?:\s[+*]\s\w)+$

New

a + b
2 + a + b
3 + 6 * 9 + 6 * 5 + a * b