復制代碼 代碼如下:

for (int i = 1; i <= 20; i++)
{
int j = i * i;
if (j >= 50)
Response.Write(i + " × " + i + " = " + j + "<br />");
}

得到結果如下：

復制代碼 代碼如下:

int min = (int)Math.Sqrt(50);

復制代碼 代碼如下:

if (Math.Pow(min, 2) < 50)
min += 1;

復制代碼 代碼如下:

for (int i = min; i <= 20; i++)
{
int j = i * i;
Response.Write(i + " × " + i + " = " + j + "<br />");
}