function max(arr){
    var m = arr[0];
    for (var i = 0; i < arr.length; i++){
        if (arr[i] >= m){
            m = arr[i];
        }
    }
    return m;
}
function main(){
    var m = max([1,2,3,4,5,6,7,8,9]);
    console.log(m);
}
main ();