用户输入的数组:[1,2,3,4]
我想要的结果:
[1,2,3]*[2,3,4]
(1*2) + (2*3) + (3*4) = 20
目前我的进展:
var array = [];
var number= document.getElementById("number").value; //this is where user inputs the number for my array
var sum = 0;
for (var i = 0; i< number.length; i++){
array.push(parseInt(number[i]));
var first= number[i-1];
var second = number[i+1];
sum += (first*second);
}
console.log(sum);