Looking for a Better Regex Pattern for Floats

I'm trying to improve my regex for identifying float numbers. Currently, I'm using this pattern: `^-?(d+.d*|d*.d+)$`. This regex checks for digits before and after the decimal point but requires at least one digit to be present. It successfully matches cases like `-90.`, `.67`, and `42.6`, but it fails for just `.` and `-.`. Are there more efficient or clearer regex patterns I can use?