JS - 點將字串轉數字(總和)?

啦la

sample:

String(5,6,7,1,9)

點將字串轉數字(總和)?

thanks

us54gzl

1. var str="5,6,7,1,9";
   
2. var arr=str.split(",");
   
3. var sum=0;
   
4. arr.forEach(function(i){
   
5.         sum+=parseInt(i);
   
6. });
   
7. document.write("Sum of "+str+" is "+sum);

複製代碼

lancon

1. const string = '5,6,7,1,9';
   
2. const sum = string.split(',').reduce((p, v) => {
   
3.         return p + parseInt(v);
   
4. }, 0);
   
5. 
   
6. console.log(sum);

複製代碼

CVSDF

var str = '5,6,7,1,9';
var arr = str.split(',');
var sum = 0;
for(var i=0; i<arr.length; i++){
sum = sum + parseInt( arr[i] );
}
alert(sum);

hihihi123hk

const str = '1,2,3,4'

const result = str.split(',')
  .map(it => +it)
  .reduce((acc, e) => acc + e, 0)

console.log(result)

via HKEPC IR Extreme 4.2.3 - iOS(4.0.2)

none_and_none

用parseInt(string, radix)時要注意:
...如果沒有指定 radix 的話，給出的結果會按照實做不同而異，請注意，通常預設值不是 10 進位。

https://developer.mozilla.org/zh ... al_Objects/parseInt

louis3412

回覆 5# hihihi123hk


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啦la

many thanks