How to Make a Calculator in Python

ElevatEd
Coding
June 26, 2024

We all use calculators in our daily lives to solve math problems, don't we? But today, we're embarking on an exciting journey. We're going to learn how to create our very own calculator using a magical tool called Python! It's like becoming a wizard of numbers, crafting our special math companion. So, put on your coding hats, because we're about to dive into the fascinating world of programming. Together, we'll explore step-by-step how to build our calculator

How to make a Calculator in Python

When it comes to creating a calculator in Python, there are various approaches you can take. You can build it without using functions, utilize functions to organize your code better, or even employ libraries like Tkinter for a graphical user interface. In this tutorial, we'll explore the method of using functions to construct a calculator. Functions help in breaking down the code into manageable chunks, making it easier to understand and maintain. So, let's dive into the step-by-step process of building a calculator using functions in Python!

Code to make a Calculator in Python

# Define addition function

def add(x, y):

return x + y

# Define subtraction function

def subtract(x, y):

return x - y

# Define multiplication function

def multiply(x, y):

return x * y

# Define division function

def divide(x, y):

return x / y

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# Display menu

print("Select operation:")

print("1. Add")

print("2. Subtract")

print("3. Multiply")

print("4. Divide")

# Take input from the user

choice = input("Enter choice (1/2/3/4): ")

# Check if choice is one of the four options

if choice in ('1', '2', '3', '4'):

num1 = float(input("Enter first number: "))

num2 = float(input("Enter second number: "))

if choice == '1':

print("Result:", add(num1, num2))

elif choice == '2':

print("Result:", subtract(num1, num2))

elif choice == '3':

print("Result:", multiply(num1, num2))

elif choice == '4':

if num2 == 0:

print("Cannot divide by zero!")

else:

print("Result:", divide(num1, num2))

else:

print("Invalid input")

This code defines four functions for addition, subtraction, multiplication, and division. It then presents a menu to the user to choose the operation they want to perform. Based on the user's choice, it takes two numbers as input and performs the selected operation using the corresponding function. Finally, it displays the result to the user.

Explanation of Code

Function Definitions

We create functions to add, subtract, multiply, and divide numbers.

User Input: The user chooses an operation (addition, subtraction, multiplication, or division) and enters two numbers.
Operation Execution: We use the chosen function to perform the operation on the input numbers.
Result Display: We show the result of the chosen operation.

This code helps us perform math operations by selecting them from a menu and entering numbers. It's like having a mini calculator right in Python!

We embarked on an exciting journey to create our calculator in Python! By using functions, we broke down complex tasks into manageable chunks, making coding easier. With step-by-step guidance, we defined functions for addition, subtraction, multiplication, and division, allowing us to perform math operations effortlessly. Now, we have our very own Python calculator, ready to solve math problems with just a few lines of code!