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Question 14

What is the output of the following code? [3 marks]

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num = 1932102
total = 0
while num != 0:
    digit = num % 10
    num //= 10
    if digit >= 5:
        continue
    if int(digit) % 2 != 0:
        total += int(digit ** 2)
    else:
        total += digit

print(total, sep="\n")
Solution

Initialize variables num with integer value 1932102, and total with integer value 0.

num num != 0? digit: num%10 New num: num//=10 digit >= 5? int(digit) % 2 != 0? New total
1932102 True 1932102 % 10 = 2 1932102 // 10 = 193210 2 >= 5: False 2 % 2 = 0: False 0 + 2 = 2
193210 True 193210 % 10 = 0 193210 // 10 = 19321 0 >= 5: False 0 % 2 = 0: False 2 + 0 = 2
19321 True 19321 % 10 = 1 19321 // 10 = 1932 1 >= 5: False 1 % 2 = 1: True 2 + int(1**2) = 3
1932 True 1932 % 10 = 2 1932 // 10 = 193 2 >= 5: False 2 % 2 = 0: False 3 + 2 = 5
193 True 193 % 10 = 3 193 // 10 = 19 3 >= 5: False 3 % 2 = 1: True 5 + int(3**2) = 14
19 True 19 % 10 = 9 19 // 10 = 1 9 >= 5: True (continue/skip)
1 True 1 % 10 = 1 1 // 10 = 0 1 >= 5: False 1 % 2 = 1: True 14 + int(1**2) = 15
0 False 15 (exit loop)

Hence, this program prints 15 with a newline character at the end (using the sep parameter in the print() function).

Answer 
15