Szathmáry László honlapja @ DEIK | Nim2 / Forward declaration

forward declaration
#include <stdio.h> void hello(); // signature with ';' at the end int main() { hello(); return 0; } void hello() { puts("hello world"); }	proc hello() # signature without '=' at the end hello() proc hello() = echo "hello world"

Forward declaration works just like in C.

If you build your code bottom-up, then forward declaration is not necessary.

proc hello()

𝥶It's just a declaration (no body, i.e. no implementation).

proc hello() =

𝥶It's a definition. The '=' sign indicates that you want to define the procedure, i.e. you also provide the body (implementation) of the procedure.