a regular expression generator for number ranges

Question

I checked on the stackExchange description, and algorithm questions are one of the allowed topics. So here goes.

Given an input of a range, where begin and ending number

Answer 1

If you find regex pattern range between 5 and 300 which also support float; there is the best answer created by me ...

^0*(([5-9]([.][0-9]{1,2})?)|[1-9][0-9]{1}?([.][0-9]{1,2})?|[12][0-9][0-9]([.][0-9]{1,2})?|300([.]0{1,2})?)$

for 1 to 300 range

^0*([1-9][0-9]?([.][0-9]{1,2})?|[12][0-9][0-9]([.][0-9]{1,2})?|300([.]0{1,2})?)$