用C#语言编辑输出代码

Question

Answer 1

for (int i = 1; i < 10; i++)
{
for (int j = 0; j < 9 - 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.Write("\n");
}