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Python

Posted by Eric Roberts
Eric Roberts
924 Points

Why do I get a "None" output in this script?

first_name = input(print("Type your first name here"))
last_name = input(print("Type your last name here"))
print( first_name, last_name, "is learning Python")

2 Answers

jb30
jb30
45,415 Points

first_name = input("Type your first name here") will print the string "Type your first name here" to the console and store the user's input in the variable first_name. You don't need to use the print function with the input function.

When you pass the print function to the input function, the input function will evaluate the print function and print its value to the console. The print function prints the string "Type your first name here" to the console and returns the value None to the input function, which then prints out the return value None and then takes user input.

Chris Freeman
Chris Freeman
Treehouse Moderator 68,468 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,468 Points

Yep!

>>> foo = input(print("Enter name > "))
Enter name >     # output of print statement includes newline character
Nonestewart      # None printed followed by user input "stewart"
>>> foo
'stewart'
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print( None, "None")