Create calci.md

Author: saqib777

calculator/calci.md

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+"""
+Simple Calculator
+-----------------------
+This program performs basic arithmetic operations:
+Addition, Subtraction, Multiplication, and Division.
+
+It runs in a loop so the user can perform multiple calculations
+until they choose to exit.
+"""
+
+# No extra imports needed since we're only using basic Python features
+
+def add(a, b):
+    """Return the sum of two numbers."""
+    return a + b
+
+def subtract(a, b):
+    """Return the difference between two numbers."""
+    return a - b
+
+def multiply(a, b):
+    """Return the product of two numbers."""
+    return a * b
+
+def divide(a, b):
+    """Return the result of dividing two numbers.
+       Includes handling for division by zero."""
+    if b == 0:
+        return "Error: Cannot divide by zero!"
+    return a / b
+
+
+def main():
+    """Main function that runs the calculator."""
+    print("🧮 Welcome to the Simple Calculator!")
+    print("You can perform addition, subtraction, multiplication, and division.")
+    print("Type 'exit' anytime to quit.\n")
+
+    # Infinite loop to keep the calculator running until user exits
+    while True:
+        # Take user input for the first number
+        num1 = input("Enter the first number: ")
+
+        # If the user types 'exit', stop the program
+        if num1.lower() == "exit":
+            print("👋 Thanks for using the calculator. Goodbye!")
+            break
+
+        # Validate that input is a number
+        try:
+            num1 = float(num1)  # Convert input to a number (supports decimals)
+        except ValueError:
+            print("⚠️ Invalid input! Please enter a number.")
+            continue  # Skip rest of the loop and ask again
+
+        # Take input for the operator (+, -, *, /)
+        operator = input("Enter operation (+, -, *, /): ")
+
+        # Check if the operator is valid
+        if operator not in ["+", "-", "*", "/"]:
+            print("⚠️ Invalid operator! Please choose from +, -, *, /.")
+            continue
+
+        # Take input for the second number
+        num2 = input("Enter the second number: ")
+
+        if num2.lower() == "exit":
+            print("👋 Thanks for using the calculator. Goodbye!")
+            break
+
+        try:
+            num2 = float(num2)
+        except ValueError:
+            print("⚠️ Invalid input! Please enter a number.")
+            continue
+
+        # Perform the chosen operation
+        if operator == "+":
+            result = add(num1, num2)
+        elif operator == "-":
+            result = subtract(num1, num2)
+        elif operator == "*":
+            result = multiply(num1, num2)
+        elif operator == "/":
+            result = divide(num1, num2)
+
+        # Display the result
+        print(f"✅ Result: {num1} {operator} {num2} = {result}\n")
+
+
+# The entry point of the program
+# Ensures that main() runs only when the file is executed directly
+if __name__ == "__main__":
+    main()