Python Traceback most recent call last

Question

The error message:

Traceback (most recent call last): File "C:/Users/DALY/Desktop/premier.py", line 1, in File "", line 1, in NameError: name 'klj' is not defined

I am getting this error when I execute this code:

nameUser=input("What is your name ? ")    
print (nameUser)

Can someone tell me why this is happening?