Printing user input?

[Mohammed_M]

Hi,
I'm v.new to Python, so please don't be too harsh :)
I get a NameError with the code below - All I want to do is store some
input taken from the user in a variable called name, & then print name

# START CODE ==========================================
# Print name demo


def PersonsDetails():
    name = input("What's your name?")
PersonsDetails()

print(name)


# END CODE ==========================================

Thanks for reading & any help on this