sumOfDigits

number: int = int(input('Enter target number: '))
numberOfDigits: int = int(input('Enter number of digits: '))
counter: int = numberOfDigits
result: int = 0
while counter != 0:
    if number == 0 and numberOfDigits != counter:
        print('Number contains ' + str(numberOfDigits - counter) + ' digits, you enter to many: ' + str(numberOfDigits))
        break
    # result = result + (number % 10) # можно сокращать a = a smth b  ->  a smth= b
    result += (number % 10)
    # number = number // 10  # можно сокращать :
    number //= 10  # как дядька
    counter -= 1
    # numberOfDigits = numberOfDigits - 1
print('Sum of ' + str(numberOfDigits - counter) + ' digits is ' + str(result))