true-math/src/checkers/ifValidNum/ifValidFormat.js

True Math - math library for numbers of arbitrary length

export default function ifValidFormat(num) {
	const regexp = /(^-?)(\d+)(\.\d+)?$|NaN|Infinity/;

	if (!regexp.test(num)) throw new Error('Please enter correct number or NaN or Infinity or -Infinity');
}