What’s a better regex pattern for validating floats?

I'm trying to improve my regex for identifying floating-point numbers. Currently, I'm using this regex: `^-?(d+.d*|d*.d+)$`. It successfully matches values like `-90.`, `.67`, and `42.6`, but it doesn't accept just `.` or `-`. I want to ensure there's at least one digit present before or after the decimal point. Any suggestions for a better or more efficient regex?