[DobbysGamertag]

pawn Код:

new age; 
if(sscanf(inputtext, "d", age)) // checks if integer, or if any text is there. 
if(age < min_age_here || age > max_age_here) // if they enter a number above / below. 
//alternatively. 
if(age >= min_age_here && age <= max_age_here)
{
    //if they enter it in between min age / max age
}