Can Any one tell me why it is getting error, if we put "print" in place of "return"?

Question

def lang(ext):
if ext == ".py":
return "Python"
elif ext == ".js":
return "JavaScript"
elif ext == ".html":
return "HTML"
elif ext == ".css":
return "CSS"
elif ext == ".c":
return "C"
else:
print("enter valid extention: ")

print("The Extention You Entered Is "+ lang(input("Enter An Extention: \n")))

Answer 1

When the function call doesn't reach any return statements it returns None instead.

The error was raised by a concatenation with string and None.

Answer 2

This is what causes the error:
"The Extension You Entered Is " + None

Answer 3

Mr. 12 Yes, it would fix the error.

Answer 4

Mr. 12
Another thing you need to understand about return is that it won't go further down if the return condition is met.
For example:
def test(num):
if num == 3:
return True
print("yes")
print (test(3))
Output: True
yes won't print because return acts like break in a loop

Hope you understand 😃😃

Answer 5

Seb TheS thank you bro.

Answer 6

Seb TheS can u please explain briefly

Answer 7

Seb TheS you are saying that, we hvae to convert the input into string! right?