Sum of an Array
HTML
<button onclick="sumOfArray();">Sum</button>JavaScript
var sumOfArray = function(){
var array = [2,-7,8,6,1,3,5,-9,3,8,12];
var sum = 0;
for(i=0; i<array.length;i++){
sum = sum + array[i];
}
console.log(typeof(sum));
alert(sum);
}