Calling functions

[Samohtvii]

I thought calling a function seemed easy enough until i tried to write one.
I though it was as easy as:

program test
testFunction()
end program test

FUNCTION testFunction()
print *, "Hello World"
END

EDIT:
ok so why does below work. I just want a function that makes my code cleaning. No passing variables, no return type or anything

program test
REAL s
s = testFunction()
end program test

FUNCTION testFunction()
print *, "Hello World"
END

THanks

 

[xwb]

A function returns a value, a subroutine doesn't. The first example is incorrect as it should be a subroutine. In the second, the function is not returning a value.

 

[Samohtvii]

ahh awesome thanks.