def main():

    def numSys(x):
        if x == 1:
            print ("BASELINE (1) REACHED!")
            return 1
        else:
            return x * numSys(x-1)

    def userSystem():
        a = input("Initial Number: ")
        try:
            a = int(a)
        except:
            print ("ERROR! Please type a valid number!")
            userSystem()
        
        factorialSum = numSys(a)
        print (factorialSum)
    
    #INITIATE FUNCTIONS
    userSystem()

main()

When inputting a number on the first prompt, it would be successful, but when i test the (try/except) function by putting a letter first, then putting a number, it would be successful but with a error in the end

Console Log