Percentage

const re = new RegExp("^\\d+(\\.\\d+)?%$", "");
const input = "95%";
const match = input.match(re);
console.log(match ? match[0] : null);

import re

pattern = re.compile(r"^\d+(\.\d+)?%$")
input_text = "95%"
for m in pattern.finditer(input_text):
    print(m.group(0))

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^\d+(\.\d+)?%$`)
	input := `95%`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}