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[英]Given an array with numbers, how can I write a recursive function that finds indices in the array when 2 elements add up to a target?
[英]How can I add up two or more array elements (numbers)
我想將var字符串中的所有元素加在一起。 我確實嘗試過,但是現在我想針對每個元素執行此操作。
var operator = document.getElementById("operation").value;
var number = document.getElementById("numbers").value;
var string = number.split(",");
var number1 = string[0];
var number2 = string[1];
var sum = number1 + number2;
document.getElementById("result").innerHTML = parseInt(sum);
歡迎任何幫助!
使用reduce()
,不要忘記將string
轉換為int
:
var number = "1,2,3,4,5"
var sum = number.split(",").reduce(function (total, num) {
return total + parseInt(num);
}, 0);
您可以使用R. Saban的方法,還有其他方法。 例如,嘗試以下操作:
var start = 0; // Using this to add each element in the array starting from 0, look below
var number = document.getElementById("numbers").value;
var string = number.split(",");
string.forEach(function (num) {
start += parseInt(num);
});
// variable "start" will hold the end result
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