Regular Expressions 101

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]*

*matches any number of characters from the set below:

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

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

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

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

-?[0-9]*\.?[0-9]+

New

Some text: -1234.45
More text: 1234.45
More text: 1.45
More text: -.45