Python Math: Multiply two integers without using the * operator in python

Python Math: Exercise-19 with Solution

Write a Python program to multiply two integers without using the * operator.

Sample Solution:

Python Code:

def multiply(x, y):
    if y < 0:
        return -multiply(x, -y)
    elif y == 0:
        return 0
    elif y == 1:
        return x
    else:
        return x + multiply(x, y - 1)

print(multiply(3, 5));

Sample Output:

15 

Flowchart:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to computing square roots using the Babylonian method.
Next: Write a Python program to calculate magic square.