The why is there a syntax error thread

[patrice]

You don't need to declare LOCAL variables that are already declared as function parameters.

Code:

export int2(xmin,xmax,ymin,ymax,yreal)
BEGIN
local xreal;
xreal:=xmin+((yreal-ymin)/(ymax-ymin));
print(xreal);
END;

and use
RETURN(xreal);
for the answer