Can someone please help me make my code work so that if the part is typed in wrong then it says a error messasge

[ChristopherMeav]

# Computer Parts


parts = []
prices = []
total = 0

print("Computer Part List")
print("Cpu=$300")
print("Gpu=$550")
print("Cooler=$235")
print("Motherboard=$360")
print("SSD=$150")
print("Fans=$100")
print()

while True:
  
  part = input("Enter a Computer part to buy (q to quit): ")
  if part.lower() == "q":
    break
  else:
    price =  float(input(f"Enter the price of a {part}: $"))
    parts.append(part)
    prices.append(price)

print("---- Your Cart ----")

for part in parts:
  print(part)

for price in prices:
  total += price


print()
print(f"Your total is: ${total}")

[whileTRUEpass]

Could you format it please? So we can understand it better.

[Firepup650]

Welcome to Ask!

1. PLEASE wrap your code in triple backticks! ```
2. Please explain what the code is supposed to do VS. what it is doing.

[QwertyQwerty88]

Hey @ChristopherMeav, welcome to the forums!

Can you please provide a link to the Repl? This way it is easier for staff and members of the community to help you!

Also see this guide on how to share your code:

How to share your code

To share your code with others, you can simply link to your repl or paste and format the code into your post! Linking to a repl The easiest way to share your code is by linking to your repl. You can find the link by clicking on your repl title, selecting “Cover page” and then copying the cover page URL. NOTE: only share repl join links or use the invite button with people you trust! [Kapture 2022-06-23 at 16.51.07] Sharing short code samples Share a snippet of your code by wrapping it in b…

[ParanormalCoder]

I Fixed it

You had “ quotation marks instead of " quotation marks and you didn’t indent stuff

parts = []
prices = []
total = 0

print("Computer Part List")
print("Cpu=$300")
print("Gpu=$550")
print("Cooler=$235")
print("Motherboard=$360")
print("SSD=$150")
print("Fans=$100")
print()

while True:

  part = input("Enter a Computer part to buy (q to quit): ")
  if part.lower() == "q":
    break
  else:
    price = float(input(f"Enter the price of a {part}: $"))
    parts.append(part)
    prices.append(price)

    print("---- Your Cart ----")

    for part in parts:
      print(part)

    for price in prices:
      total += price

    print()
    print(f"Your total is: ${total}")

[whileTRUEpass]

I would expect to be like

while True:

  part = input("Enter a Computer part to buy (q to quit): ")
  if part.lower() == "q":
    break
  else:
    price = float(input(f"Enter the price of a {part}: $"))
    parts.append(part)
    prices.append(price)

print("---- Your Cart ----")

for part in parts:
   print(part)

for price in prices:
   total += price

print()
print(f"Your total is: ${total}")

[QwertyQwerty88]

@ParanormalCoder

You had “ quotation marks instead of " quotation marks and you didn’t indent stuff

All of that was most likely correct but Discourse changed Christopher’s post because Christopher didn’t format it.

[QuantumCodes]

I added a list of all parts and added an elif clause to check whether the part exists or not.

parts = []
prices = []
total = 0
all_parts = ("cpu", "gpu", "cooler", "motherboard", "ssd", "fans") #list of all parts in a common case

print("Computer Part List")
print("Cpu=$300")
print("Gpu=$550")
print("Cooler=$235")
print("Motherboard=$360")
print("SSD=$150")
print("Fans=$100")
print()

while True:
  
  part = input("Enter a Computer part to buy (q to quit): ")
  if part.lower() == "q":
    break
  elif part.lower() not in all_parts: #check whether part is wrong
    print(f"{part} is not available here...")
  else:
    price =  float(input(f"Enter the price of a {part}: $"))
    parts.append(part)
    prices.append(price)

print("---- Your Cart ----")

for part in parts:
  print(part)

for price in prices:
  total += price

print()
print(f"Your total is: ${total}")