Write a full step by step Python code for calculator ? Best School /college project

Python code for a basic calculator that can perform addition, subtraction, multiplication, and division. This code will prompt the user to enter two numbers and then choose an operation. It will then perform the operation and display the result.

Let’s break down the process of creating a simple calculator in Python step by step:

Step 1: Displaying Options to the User

We start by printing a menu of operations that the calculator can perform. This includes addition, subtraction, multiplication, and division.

print("Select operation:")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")

Step 2: Getting User Input

Next, we prompt the user to select an operation by entering a corresponding number from the menu. We also ask the user to input the two numbers they want to perform the operation on.

choice = input("Enter choice (1/2/3/4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

Step 3: Performing the Calculation

Based on the user’s choice of operations, we perform the calculation using the input numbers.

if choice == '1':
    result = num1 + num2
elif choice == '2':
    result = num1 - num2
elif choice == '3':
    result = num1 * num2
elif choice == '4':
    if num2 == 0:
        print("Cannot divide by zero!")
    else:
        result = num1 / num2
else:
    print("Invalid Input")

Step 4: Displaying the Result

Finally, we display the result to the user.

print("Result:", result)

Putting It All Together

Here’s the complete code incorporating all the steps:

print("Select operation:")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")

choice = input("Enter choice (1/2/3/4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

if choice == '1':
    result = num1 + num2
elif choice == '2':
    result = num1 - num2
elif choice == '3':
    result = num1 * num2
elif choice == '4':
    if num2 == 0:
        print("Cannot divide by zero!")
    else:
        result = num1 / num2
else:
    print("Invalid Input")

print("Result:", result)

This code will perform basic arithmetic operations based on user input.

This code defines four functions for addition, subtraction, multiplication, and division. Then, it displays a menu for the user to select an operation. After the user selects an operation, it takes two numbers as input from the user and performs the selected operation on them.

If the user selects division and the second number is 0, it returns a message saying “Cannot divide by zero!”. Finally, it displays the result to the user.

Leave a Reply

Your email address will not be published. Required fields are marked *