Return problems

Before I go completely off my head, could somebody explain why the following user-defined function:-

switch(integer raining)
{
   if (raining==1)
   {
       raining=0;
       llShout(7,"off");
   }
   else
   {
       raining=1;
       llShout(7,"on");
   }
   return (raining);
} 

gives rise to a 'Return statement type doesn't match function return type' error?

You defined a function that takes an integer as input and returns nothing to the calling function.

Then you tried to return an integer.

You either need to do this:

integer switch (integer raining)
{
//...same body...
    return raining;
}

Or (as seems more likely) you want to make raining a global.

integer raining;

switch()
{
//...same body...
//return; // not actually needed
}

Argent,

Many thanks.