The return value of a function can no longer be discarded and the result must either be tested or saved to a variable. For example:
Function foo(i : integer) returns boolean
You can no longer simply write
foo(42)
Instead you must either declare a boolean value into which the result is stored or test the value.
Examples:
bool someResult;
someResult = foo(42)
or
if foo(42)
then ....
End
