Python Functions Statements Return - ashish9342/FreeCodeCamp GitHub Wiki
All functions return a value when called.
If a return statement is followed by an expression list, that expression list is evaluated and the value is returned:
>>> def greater_than_1(n):
... return n > 1
...
>>> print(greater_than_1(1))
False
>>> print(greater_than_1(2))
True
If no expression list is specified, None
is returned:
>>> def no_expression_list():
... return # No return expression list.
...
>>> print(no_expression_list())
None
If a return statement is reached during the execution of a function, the current function call is left at that point:
>>> def return_middle():
... a = 1
... return a
... a = 2 # This assignment is never reached.
...
>>> print(return_middle())
1
If there is no return statement the function returns None when it reaches the end:
>>> def no_return():
... pass # No return statement.
...
>>> print(no_return())
None