xuat tam can hinh * bang vong lap for

[ngd...@gmail.com]

int i, j;
for (i = 0; i < 6; i++)
{
for (j = -5; j < 6; j++)
{
if ( ( j <= i ) & ( j >= - i) )
System.Console.Write("*");

else
System.Console.Write(" ");
}
System.Console.Write("\n");