INC means an include which contains inbuilt scripts on the file.no need to script it on the pawn file just include the file on the pawn file
Example:
Create a Notepad save the file as Justinbieber.inc and paste it on pawno>include
Add these scripts on Justinbieber.inc and save it:
[pawn]stock IsNumber(const string[])
{
new length=strlen(string);
if (length==0) return false;
for (new i = 0; i < length; i++)
{
if (
(string
> '9' || string < '0' && string!='-' && string!='+')
|| (string=='-' && i!=0)
|| (string=='+' && i!=0)
) return false;
}
if (length==1 && (string[0]=='-' || string[0]=='+')) return false;
return true;
}[/pawn]
and on pawn script add [pawn] #include <Justinbieber>[/pawn]
now use it without adding this function on your pawn script
Hope it helped!!