[VishvaJeet]

if you have defined with stock & you are not using that function in script. compiler will not return any warning/error.

pawn Code:

stock strlower(string[])
{

    for(new i=0; string[i] != EOS; i++)
        string[i] = tolower(string[i]);
    return string;
}

if you are not using stock & you are not using that function in script. compiler will return warning/error.

pawn Code:

strlower(string[])
{

    for(new i=0; string[i] != EOS; i++)
        string[i] = tolower(string[i]);
    return string;
}

that is difference.