Create calc.py

[PavelLinearB]

✨ PR Description

Purpose: Implements a basic command-line calculator with four arithmetic operations and input validation.

Main changes:

• Added four basic arithmetic functions (add, subtract, multiply, divide)
• Implemented interactive user input loop with operation selection and number input
• Added error handling for invalid inputs and option to perform multiple calculations

Generated by LinearB AI and added by gitStream.
_{AI-generated content may contain inaccuracies. Please verify before using. We’d love your feedback! 🚀}

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✨ PR Review

Security - calc/calc.py

Details:

Problem: No handling of division by zero, which could crash the program
Fix: Add zero check in divide function and handle the error case
Why: Prevents program crashes and provides better user experience

@@ -13,7 +13,10 @@

# This function divides two numbers
def divide(x, y):
-    return x / y
+    if y == 0:
+        raise ValueError("Cannot divide by zero")
+    else:
+        return x / y

print("Select operation.")
print("1.Add")
@@ -42,7 +45,11 @@
            print(num1, "*", num2, "=", multiply(num1, num2))

        elif choice == '4':
-            print(num1, "/", num2, "=", divide(num1, num2))
+            try:
+                print(num1, "/", num2, "=", divide(num1, num2))
+            except ValueError as e:
+                print(e)
+                continue

Maintainability - calc/calc.py

Details:

Problem: User input validation for next_calculation is case-sensitive and doesn't handle whitespace
Fix: Add case-insensitive comparison and strip whitespace
Why: Improves user experience by being more forgiving with input formatting

@@ -47,7 +47,7 @@
        # check if user wants another calculation
        # break the while loop if answer is no
        next_calculation = input("Let's do next calculation? (yes/no): ")
-        if next_calculation == "no":
+        if next_calculation.strip().lower() == "no":
          break
    else:
        print("Invalid Input")

Generated by LinearB AI and added by gitStream.
_{AI-generated content may contain inaccuracies. Please verify before using. We’d love your feedback! 🚀}