在一系列数字中找到第一个缺失的数字 [英] Find first missing number in a sequence of numbers

问题描述

我想弄清楚如何找到像这样的数字序列的第一个缺失数字（1,2,3,5,6,9,10,15）

I am trying to figure out how to find the first missing number of a sequence of numbers like this (1,2,3,5,6,9,10,15)

我想把第一个缺失的数字＃4放入一个变量供以后使用，但不知道怎么做？

I want to put the first missing number, #4, into an variable for later use but don't know how to do so?

我有试过这个，但这只给了我最后一个数字：

I have tried this but this only gives me the last number:

var mynumbers=new Array(1,2,3,6,9,10);
for(var i = 1; i < 32; i++) {
    if(mynumbers[i] - mynumbers[i-1] != 1) {
        alert("First missing number id: "+mynumbers[i]);
        break;
    }
}

首先，它给了我第一个数字数字序列中的洞，其次，如果我没有插入休息，它会继续警告所有在洞之后出现的数字。我只想要从1到32的第一个缺失数字序列。我该怎么做？

First of all it gives me the first number after an "hole" in the numbersequence, secondly it continues to alert all numbers comming after an "hole" if I don't insert an break. I only want the first missing number of an numbersequence from 1 - 32. How do i do so?

希望得到帮助并提前感谢; - ）

Hoping for help and thanks in advance ;-)

推荐答案

这个怎么样

var mynumbers = new Array(1,2,3,6,9,10);
var missing;

for(var i=1;i<=32;i++)
{    
   if(mynumbers[i-1] != i){
        missing = i;
        alert(missing);
        break;
   }
}

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