beginner

Calculator

A simple calculator that performs basic arithmetic operations: addition, subtraction, multiplication, and division.

Features

Basic arithmetic operations
User input handling
Error handling for division by zero
Loop for continuous calculations

Technologies Used

Python BasicsFunctionsLoopsError Handling

Explanation

This calculator uses a while loop to continuously accept user input. It uses match-case (or if-elif) to determine the operation and performs the calculation. Error handling ensures division by zero is caught gracefully.

Source Code

def add(a, b): return a + b
def subtract(a, b): return a - b
def multiply(a, b): return a * b
def divide(a, b):
    if b == 0:
        return "Error: Division by zero!"
    return a / b

def calculator():
    print("=== Python Calculator ===")
    print("Operations: +, -, *, /")
    print("Type 'quit' to exit\n")

    while True:
        try:
            num1 = input("Enter first number: ")
            if num1.lower() == 'quit':
                print("Goodbye!")
                break
            num1 = float(num1)

            op = input("Enter operator (+, -, *, /): ")
            num2 = float(input("Enter second number: "))

            if op == '+':
                result = add(num1, num2)
            elif op == '-':
                result = subtract(num1, num2)
            elif op == '*':
                result = multiply(num1, num2)
            elif op == '/':
                result = divide(num1, num2)
            else:
                print("Invalid operator!")
                continue

            print(f"Result: {num1} {op} {num2} = {result}\n")
        except ValueError:
            print("Please enter valid numbers!\n")

calculator()