About def and return

Question

after 3 months learn python, learning oop, create many project, but i never understand about return in function.

def okay(msg):
python = 'programming language'
nice = print('you are ' + str(msg))
return python

okay('good')
print(python) #error

so how to print python?

Answer 1

You can access the returned value if you declare the variable as global in your function definition:

def okay(msg):
global python
python = 'programming language'
nice = print('you are ' + str(msg))
return python

okay('good')
print(python)

# output:
# you are good
# programming language

see, e.g. https://www.google.ca/amp/s/pythontips.com/2013/07/28/the-use-of-return-and-global-keywords/amp/

Answer 2

def okay(msg):
python = 'programming language'
nice = print('you are ' + str(msg))
return python

print(okay("good"))

output-->
you are good
programming language...

suppose
def hi(x):
......
......
......
return 6

##this means...
##hi(x) = 6
print(hi(7))
print(hi(78))
print(hi(0.6))

every print will print 6

Answer 3

good explanation.thnx.

but in tutorial, its said: return can make something useable later.

something wrong about you:
it will not print python because its in variable

just wonder how can i print python outside function