Code:
using System;
class program
{
public static void Main()
{
int number, i, k, count = 1;
Console.Write("Enter number of rows\n");
number = int.Parse(Console.ReadLine());
count = number - 1;
for (k = 1; k <= number; k++)
{
for (i = 1; i <= count; i++)
Console.Write(" ");
count--;
for (i = 1; i <= 2 * k - 1; i++)
Console.Write("*");
Console.WriteLine();
}
count = 1;
for (k = 1; k <= number - 1; k++)
{
for (i = 1; i <= count; i++)
Console.Write(" ");
count++;
for (i = 1; i <= 2 * (number - k) - 1; i++)
Console.Write("*");
Console.WriteLine();
}
Console.ReadLine();
}
}
Output:
Enter number of rows
3
*
***
*****
***
*
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