Sum Num

by Denise Nepraunig

HTML

<h1>Sum Num</h1>

JavaScript

function sumnum(arr) {
    var sum = 0;
    //alert(arr.length);
    for(var i = 0; i < arr.length; i++) {
        sum += arr[i];
    } 
    return sum;
}

function sumrec(arr, index) {
    console.log(index);
    if(index == 0) {
        return arr[0];
    } else {
        return arr[index] + sumrec(arr, index-1);
    }
}


var array = [ 1, 2, 3 ];

var sum = sumnum(array);
alert(sum);

var sumr = sumrec(array, array.length-1);
alert(sumr);