用于循环说明

所以我一直试图弄清楚它是如何工作的,但我的书并不能很好地解释它.

有人可以解释一下为什么结果是45？它不应该是55吗？

这是我的代码,结果如下图所示

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        int loopStart;
        int loopEnd;
        int answer = 0;

        loopStart = int.Parse(textBox1.Text);
        loopEnd = int.Parse(textBox2.Text);

        //The code will keep running as long as End is bigger than start
        for (int i = loopStart; i < loopEnd; i++)
        {
            answer = answer + i;
        }
        MessageBox.Show(answer.ToString());
    }

}