Simple Calculator | Using PYTHON

 🔷Problem: Develop a basic calculator that can perform addition,       subtraction, multiplication, and division.

 🔷Solution: Source Code :

🔷How the code Works:

 Step 1: Define Function:

👉The code defines a function named calculate(num1, operator, num2). This function takes three arguments: 

🔷num1: The first number (operand) for the calculation. 

🔷operator: The mathematical operator (e.g., "+", "-", "*", "/") to be applied. 

🔷num2: The second number (operand) for the calculation.

The function performs the specified calculation and returns the result.

Step 2: Conditional Statements for Operations:

👉The function uses an if-elif statement structure to determine the appropriate operation based on the provided operator:

🔷if operator == "+":: If the operator is "+", it performs addition using num1 + num2 and returns the result. 

🔷elif operator == "-":: If the operator is "-", it performs subtraction using num1 - num2 and returns the result. 

🔷elif operator == "*":: If the operator is "*", it performs multiplication using num1 * num2 and returns the result.

🔷elif operator == "/":: If the operator is "/", it performs division using num1 / num2. However, it includes an additional check: 

🔷if num2 == 0:: If the second number (num2) is zero, it attempts to divide by zero, which is a mathematical error. It prints an error message ("Error: Division by zero") and returns None to indicate an unsuccessful calculation. 

🔷else:: If num2 is not zero, it proceeds with the division and returns the result (num1 / num2).

Step 3: Handling Invalid Operator: 

🔷else:: If the provided operator doesn't match any of the valid operators ("+", "-", "*", "/"), it prints an error message ("Invalid operator") and returns None to indicate an unsuccessful calculation.

Step 4: Example Usage:

👉The code snippet demonstrates how to use the calculate function with some examples: 

🔷result = calculate(10, "+", 5): Performs 10 + 5 and assigns the result (15) to the result variable. 

🔷print(result): Prints the calculated result (15).