w3resource

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 in python.

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:

Flowchart: Multiply two integers without using * operator in python

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

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.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

Python: Tips of the Day

Lambdas for Sorting:

>>> students = [{'name': 'John', 'score': 98}, {'name': 'Mike', 'score': 94}, {'name': 'Jennifer', 'score': 99}]
>>> sorted(students, key=lambda x: x['score'])
[{'name': 'Mike', 'score': 94}, {'name': 'John', 'score': 98}, {'name': 'Jennifer', 'score': 99}]