The longer number

Find the first number in the text, taking the decimal form when there is one. 12.5 is one number, not a 12 followed by something. Do not anchor the pattern.

Corpus

Steps0/ 408 · par 136

Every input, what the pattern matched in it, and what each group captured
Input	Match	Steps
	(empty)	3
	(empty)	3
	(empty)	3
	(empty)	3
	(empty)	3

Trace

Select an input to step through what your pattern did to it.

Cmd-Enter submits too.