I ned a program to print sum of digits without using while loop?

Answer 1

In python 3 I would write the following (assuming the digits are input by a user):

#!/usr/bin/python

a = input("Type a number: ")

sum = 0

for i in a: #the for next loop performs the function of a while loop with less lines of code.

#(My formating keeps getting deleted when I publish this answer. There should always be a tab- strictly speaking four spaces before this line) sum = sum + int(i)

sum = str(sum)

print("Your number was", a + ". The sum of its digits is" , sum + ".")

As you can see, the for next loop iterates through each value in the string "a", and sets its value to "i". For each iteration, the current value of i is added to the variable "sum" until the end of the number is reached. The program then prints the original number, and the sum of its digits.