Why won't this code break the while True loop in python?

Question

Just started learning python earlier today and I can't work out why this code won't end the program if "N" is entered. Also if I change the last if statement to.= "Y" then even if I type Y then it closes which is confusing me so much. I was just trying to make a simple program to convert Fahrenheit to Celcius if prompted without looking up any of the code so if it's badly written that's why.

while True:
    def temp_func():
        print("Is the temperature you'd like to convert in Fahrenheit or Celcius?")
        temp = input()
        if temp == "Fahrenheit":
            F_temp = int(input("Please write the temperature."))
            converted_temp_F = ((F_temp - 32) * 5 / 9)
            print(str(converted_temp_F))
        elif temp == "Celcius":
            C_temp = int(input("Please write the temperature."))
            converted_temp_C = ((C_temp * (9 / 5)) + 32)
            print(str(converted_temp_C))

    temp_func()
    print(input("Would you like to convert another temperature? (Y/N) "))
    if input == 'Y':
        True
    if input == 'N':
        break
print ("Goodbye")

Answer 1

replace your print(input... and conditions with:

 response = input("Would you like to convert another temperature? (Y/N) ").upper()
 if response == 'N':
    break

Answer 2

You need to store the input value given by the user in a variable for Y/N . You should move the function out of the while loop

def temp_func():
    print("Is the temperature you'd like to convert in Fahrenheit or Celcius?")
    temp = input()
    if temp == "Fahrenheit":
        F_temp = int(input("Please write the temperature."))
        converted_temp_F = ((F_temp - 32) * 5 / 9)
        print(str(converted_temp_F))
    elif temp == "Celcius":
        C_temp = int(input("Please write the temperature."))
        converted_temp_C = ((C_temp * (9 / 5)) + 32)
        print(str(converted_temp_C))

while True:
    temp_func()
    Y_N = input("Would you like to convert another temperature? (Y/N) ")
    if Y_N == 'N':
        break
print ("Goodbye")

Answer 3

Try like this

def temp_func():
    print("Is the temperature you'd like to convert in Fahrenheit or Celcius?")
    temp = input()
    if temp == "Fahrenheit":
        F_temp = int(input("Please write the temperature."))
        converted_temp_F = ((F_temp - 32) * 5 / 9)
        print(str(converted_temp_F))
    elif temp == "Celcius":
        C_temp = int(input("Please write the temperature."))
        converted_temp_C = ((C_temp * (9 / 5)) + 32)
        print(str(converted_temp_C))

while True:

    temp_func()
    x = input("Would you like to convert another temperature? (Y/N) ")
    if x.lower() == "n":
        break
    
print ("Goodbye")

Answer 4

On this line:

print(input("Would you like to convert another temperature? (Y/N) "))

Here, if you do -

input("Would you like to convert another temperature? (Y/N) ")

It will do the printing for you, and take an input. now what you need to do is store the value in a variable. For example:

choice = input("Would you like to convert another temperature? (Y/N) ")

Now compare the choice variable and you are good to go!