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• Lab
• A Cloud Guru

Writing Four Functions to Perform Different Arithmetic Operations in Python

In this hands-on lab, we will attempt to write four functions that will perform different arithmetic operations: addition, subtraction, multiplication, and division.

Path Info

Level
Beginner
Duration
2h 0m
Published
Aug 06, 2020

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1. Challenge

Create a File and Make It Executable

1. Create the file:

``````touch myFile.py
``````
2. Make it executable:

``````chmod +x myFile.py
``````
2. Challenge

Write Three Functions That Are Able to Add, Subtract, and Multiply Two Numbers

1. Open the file:

``````vim myFile.py
``````
2. Add the following to the file:

``````#!/usr/bin/python

return n1+n2
def sub(n1, n2):
return n1-n2
def multi(n1, n2):
return n1*n2
``````
3. Challenge

Write a Function to Divide Two Numbers and Implement a Check for Division by 0

1. Add the following to the file:

``````def div(n1, n2):
if n2 == 0:
return "ERROR: Cannot divide by 0. Second parameter cannot be a 0!"
else:
return n1/n2
``````
4. Challenge

Run Tests and Call All Four Functions

1. Add the following to the file:

``````n1 = 10
n2 = 11

print(sub(n1, n2))
print(multi(n1, n2))
print(div(n1, n2))
n2 = 0
print(div(n1, n2))
``````
2. Save and exit the file by pressing Escape followed by `:wq`.

3. Call all four functions:

``````./myFile.py
``````

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What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

Did you know?

On average, you retain 75% more of your learning if you get time for practice.