How do I terminate a program in Python?

Question

This is my project description:

Write a program that displays the following menu:

1) Convert Fahrenheit to Celsius
2) Convert Celsius to Fahrenheit

Enter 1, 2, or 0 to exit:

In the case of options 1 and 2, the program should then prompt the user for the temperature, perform the conversion, and output the result. Then the program should re-display the menu. When option 0 is chosen, the program should exit.

Here is what I have so far:

a = raw_input("1) Convert Fahrenheit to Celsius \n2) Convert Celsius to Fahrenheit \nEnter 1, 2, or 0 to exit: ")

x = raw_input("Enter degree: ")

y = float((x - 32) / 1.8)

x = raw_input("Enter degree: ")

z = float((x + 32) * 1.8)

if a == 1:
    print(y)

if a == 2:
    print(z)

How can I terminate this program? Where else am I messing up?

Answer 1

• Get rid of the second x = raw_input(... line. You don't need it.
• Calculate y right before you print it, inside the if block. No point doing math the user didn't want.
• Same for z: calculate it right before you need it.
• Put this after the a = raw_input(... line:

Code:

if a == 0:
    import sys
    sys.exit(0)

Answer 2

You need to:

1. convert a and x to int.

   a = int(raw_input("1) Convert Fahrenheit to Celsius \n2) Convert Celsius to Fahrenheit \nEnter 1, 2, or 0 to exit: "))
   
   x = int(raw_input("Enter degree: "))
   

2. Do the calculations inside if blocks.

3. Also, get rid of the second x = raw_input("Enter degree: ")

4. And as said in above answer, you can use the sys.exit(0)