[Misiur]

i is for integer, and you are trying to capture it in a string. Strval is not neccessary if you use i or d. Also sscanf returns 0 on success, and other values on error. So

pawn Код:

new 
    age;
if(!sscanf(inputtext, "i", age)) {
    if(13 <= age <= 99) return SendClientMessage(playerid, -1, "You dun goof'd, age between 13 and 99 must be, Yoda said so");
    PlayerInfo[playerid][pAge] = age;