使用For循环输出一个数字菱形
//正三角形
for (int i = 1; i <= 7; i++)
{
for (int j = 1; j <= 7 - i; j++)
{
Console.Write(" ");
}
for (int j = 1; j <= i; j++)
{
Console.Write(j);
}
for (int j =i - 1; j >=1; j--)
{
Console.Write(j);
}
Console.WriteLine("");
}
//反三角形(和正三角唯一不同的地方就是最外层for循环)
for (int i = 7; i > 0; i--)
{
for (int j = 1; j <= 7 - i; j++)
{
Console.Write(" ");
}
for (int j = 1; j <= i; j++)
{
Console.Write(j);
}
for (int j = i - 1; j >= 1; j--)
{
Console.Write(j);
}
Console.WriteLine("");
}