遍历数组而不会引发异常 [英] Looping through an array without throwing exception

问题描述

说我有一个值数组:

string[] text = new string[] { "val1", "val2", "val3", "val4", "val5" };

然后我有一个基本的循环:

Then I have a basic loop:

for (int i = 0; i <= 30; i++)
{
    Console.WriteLine(i + " = " + text[i])
}

很明显，这将导致超出范围的异常，所以我想做的是当计数器达到数组的上限然后回到起点.

Obviously, this will cause an out of bounds exception, so what I want to do is when the counter reaches the upper bound of the array then go back to the start.

所以

0 = val1    
1 = val2    
2 = val3    
3 = val4    
4 = val5    
5 = val1    
6 = val2    
7 = val3    
etc..

推荐答案

您可以使用模运算符:

Console.WriteLine(i + " = " + text[i % 5])

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