Merge pull request #1963 from sarayusreeyadavpadala/add

Comments are added

Author: geekcomputers

Sum of digits of a number.py

@@ -1,7 +1,13 @@
-q=0
-n=int(input("Enter Number: "))
-while(n>0):
- r=n%10
- q=q+r
- n=n//10
+q=0   # Initially we assigned 0 to "q", to use this variable for the summation purpose below.
+    # The "q" value should be declared before using it(mandatory). And this value can be changed later.
+
+n=int(input("Enter Number: "))   # asking user for input
+while n>0:         # Until "n" is greater than 0, execute the loop. This means that until all the digits of "n" got extracted.
+
+   r=n%10           # Here, we are extracting each digit from "n" starting from one's place to ten's and hundred's... so on.
+
+   q=q+r            # Each extracted number is being added to "q".
+
+   n=n//10          # "n" value is being changed in every iteration. Dividing with 10 gives exact digits in that number, reducing one digit in every iteration from one's place.
+
 print("Sum of digits is: "+str(q))