C# 的 foreach ... in 用起來很方便呢!
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C# also provides the foreach statement. This statement provides
a simple, clean way to iterate through the elements of an array.
For example, the following code creates an array called numbers
and iterates through it with the foreach statement:
int[] numbers = {4, 5, 6, 1, 2, 3, -2, -1, 0};
foreach (int i in numbers)
{
System.Console.WriteLine(i);
}
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