JAVASCRIPT

check if input is a number javascript

// Another option is typeof which return a string
if (typeof(val) === 'number') {
	// Guess what, it's a bloody number!
}

how to check if the number inputed is number

const checkInputIfNumber = isNaN(0924891242a)
console.log(checkInputIfNumber) //returns true

check if input is numeric

import sys
def checkNum(number):
    try:
        number = float(number)
    except ValueError:
        print("That is not a float.")
        sys.exit()
    return number