 A C C R E T E

## How To Make A Python Calculator ?

Python is a versatile programming language that can be used for various applications, including building a calculator.

A calculator built with Python is a great way to practice programming skills and can be a useful tool for basic arithmetic calculations.

In this blog post, we will guide you through the steps to create a simple calculator in Python.

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## Step 1: Choose an IDE

The first step is to choose an Integrated Development Environment (IDE) to write your Python code.

Some popular options are PyCharm, Spyder, and Jupyter Notebook.

For this tutorial, we will be using Jupyter Notebook as it is easy to use and provides an interactive interface.

## Step 2: Create a new Python file

Once you have chosen your IDE, create a new Python file and save it with a meaningful name such as “calculator.py”.

## Step 3: Import necessary libraries

In this step, you need to import the necessary libraries to perform mathematical operations.

The “math” library is used to perform complex mathematical calculations, and the “sys” library is used to exit the program when necessary.

``````import math
import sys``````

## Step 4: Define the calculator function

In this step, define a function called “calculator” that will take two inputs from the user: the first number and the second number.

The function should then ask the user to select the operation they want to perform (+, -, *, or /).

``````def calculator():
``````    num1 = float(input("Enter the first number: "))
num2 = float(input("Enter the second number: "))
operation = input("Select operation (+, -, *, /): ")``````

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## Step 5: Perform the calculation

Now that you have the numbers and operation selected, it is time to perform the calculation.

Use an if-else statement to check the selected operation and perform the calculation accordingly.

You can use the “math” library to perform complex mathematical calculations.

``````if operation == "+":
result = num1 + num2
elif operation == "-":
result = num1 - num2
elif operation == "*":
result = num1 * num2
elif operation == "/":
result = num1 / num2
else:
print("Invalid operation selected.")
sys.exit()``````

## Step 6: Display the result

Finally, display the result of the calculation to the user using the “print” statement.

``print("Result: ", result)``

## Step 7: Test the program

Test the program by running it and entering two numbers and an operation.

The program should perform the calculation and display the result.

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## Full code:

``````
import math
import sys
def calculator():
num1 = float(input("Enter the first number: "))
num2 = float(input("Enter the second number: "))
operation = input("Select operation (+, -, *, /): ")
if operation == "+": result = num1 + num2
elif operation == "-": result = num1 - num2
elif operation == "*": result = num1 * num2
elif operation == "/": result = num1 / num2
else:
print("Invalid operation selected.")
sys.exit()
print("Result: ", result)

calculator()
``````

## Conclusion

In conclusion, building a calculator in Python is a great way to practice programming skills and can be a useful tool for basic arithmetic calculations.

By following the steps outlined in this tutorial, you can easily create a simple calculator in Python.

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