JavaScript - 程式碼片段，Snippets，Gist

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求n個數位累加和

1. 遞迴實現

   function getSum(x) {  if (x == 1) {    return 1;  }  return x + getSum(x - 1);}var result = getSum(100);console.log(result);

求一個數位每個位元上的和 :如:23--->5

1. 遞迴實現

   function getnumberSum(x) {  if (x < 10) {    return x;  }  return parseInt(x % 10 + getnumberSum(x / 10));}console.log(getnumberSum(123));

JavaScript - 程式碼片段，Snippets，Gist