Bug?

Question

Why does this code:

x = input()

if x == "Visa" or "Amex":
print("accepted")

Only output accepted no matter what the input is?

Answer 1

Because the if condition is wrong.

if (x == "Visa") or (x == "Amex"):
...

is the correct syntax.

You ask the computer: if the input is equal to Visa or if the string "Amex" is a value, which it is, so it's True every single time. Try the correct syntax and try also not to assume a bug

Answer 2

if x=="Visa" or x=="Amex":

# Or

if x in ["Visa","Amex"]: