I have a list of numbers and I have to use a function to display them in celsius, they are in fahrenheit now.
nums = [30,34,40,36,36,28,29,32,34,44,36,35,28,33,
Your function seems to take as input a single number, yet you're giving it a list of numbers. If you want to generate a list of converted numbers using that function, you can use list comprehension:
cels = [fahrenToCel(fah) for fah in nums]