C# - Pattern printing programs

1. Generated by Foxit PDF Creator © Foxit Software
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Prof. Mukesh N Tekwani (9869 488 356)
PATTERN PRINTING PROGRAMS
1.
1
23
456
7 8 9 10
11 12 13 14 15
16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 32 33 34 35 36
37 38 39 40 41 42 43 44 45
46 47 48 49 50 51 52 53 54 55
using System;
namespace Pattern1
{
class Program
{
static void Main()
{
int num = 1;
int i, j;
for (i = 1; num <= 55; i++)
{
for (j = 1; j <= i; j++)
{
Console.Write(num.ToString() + " ");
num++;
}
Console.Write("n");
}
Console.ReadLine();
}
}
}
Page 1 of 8

2. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
2.
// Program to print the following output:
// 0 1 0 1 0
// 1 0 1 0 1
// 0 1 0 1 0
// 1 0 1 0 1
// 0 1 0 1 0
// Logic:
// Consider first row as r = 0 and first col as c = 0.
// From output, we observe that whenever r + c is an even no,
// we display a 0 and whenever r + c is odd we display a 1.
using System;
namespace Pattern2
{
class Program
{
static void Main()
{
int[,] x = new int[5, 5];
for (int r = 0; r < 5; r++)
{
for (int c = 0; c < 5; c++)
{
if ((r + c) % 2 == 0)
x[r, c] = 0;
else
x[r, c] = 1;
}
}
for (int r = 0; r < 5; r++)
{
for (int c = 0; c < 5; c++)
{
Console.Write("{0}t", x[r, c]);
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}
Page 2 of 8

3. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
3.
I/p:
Enter no. of rows
8
O/p:
1
0 1
1 0 1
0 1 0 1
1 0 1 0 1
0 1 0 1 0 1
1 0 1 0 1 0 1
0 1 0 1 0 1 0 1
using System;
namespace Pattern6
{
class Program
{
public static void Main()
{
int h; // height of triangle
Console.WriteLine("Enter no. of rows ");
h = int.Parse(Console.ReadLine());
Console.WriteLine("1");
for (int r = 1; r < h; r++)
{
for(int c = 0; c <= r; c++)
{
if((r + c) % 2 == 0)
Console.Write("1t");
else
Console.Write("0t");
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}
Page 3 of 8

4. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
4.
Enter no. of rows
8
0 1 0 1 0 1 0 1
1 0 1 0 1 0 1
0 1 0 1 0 1
1 0 1 0 1
0 1 0 1
1 0 1
0 1
1
using System;
namespace Pattern7
{
class Program
{
public static void Main()
{
int h; // height of triangle
Console.WriteLine("Enter no. of rows ");
h = int.Parse(Console.ReadLine());
for (int r = h; r >= 1; r--)
{
for (int c = 1; c <= r; c++)
{
if ((r + c) % 2 == 0)
Console.Write("1t");
else
Console.Write("0t");
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}
Page 4 of 8

5. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
5.
1
22
333
4444
55555
using System;
namespace Pattern100
{
class Program
{
static void Main()
{
for (int r = 1; r <= 5; r++)
{
Console.WriteLine(" ");
if (r >= 10)
break;
for (int c = 1; c <= 5; c++)
{
// Console.Write(" * ");
Console.Write(r);
if (c == r)
goto loop1;
}
loop1: continue;
}
Console.ReadLine();
}
}
}
Page 5 of 8

6. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
6.
//To print the pattern:
// 1 2 3 4
// 5 6 7 8
// 9 10 11 12
using System;
namespace Arrays4
{
class TwoD
{
public static void Main()
{
int r, c;
int[,] x = new int[3, 4];
for (r = 0; r < 3; ++r)
{
for (c = 0; c < 4; ++c)
{
x[r, c] = (r * 4) + c + 1;
Console.Write(x[r, c] + " ");
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}
Page 6 of 8

7. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
7. Bubble sort of a numeric array
Org list
12 -20 1 -32 65 -44 11 370 9 19
Sorted list
-44 -32 -20 1 9 11 12 19 65 370
using System;
namespace BubbleSort
{
class Program
{
static void Main()
{
int[] a = {12, -20, 1, -32, 65, -44, 11, 370, 9, 19};
int temp;
int ind = 0;
int n = a.Length;
//display the original list
Console.WriteLine("Org list");
for (int i = 0; i < n; i++)
{
Console.Write(a[i] + "t");
}
// now sort
do
{
ind = 0;
for (int i = 0; i < n-1; i++)
{
if (a[i] > a[i + 1])
{
temp = a[i];
a[i] = a[i + 1];
a[i + 1] = temp;
ind = 1; // since swapping has taken ind = 1
}
}
} while (ind != 0);
//display the sorted list
Console.WriteLine("Sorted list");
for (int i = 0; i < n; i++)
{
Console.Write(a[i] + "t");
}
Console.ReadLine();
}
}
}
Page 7 of 8

8. Generated by Foxit PDF Creator © Foxit Software
http://www.foxitsoftware.com For evaluation only.
Prof. Mukesh N Tekwani (9869 488 356)
8. Exception – from question paper. WAP to display an error msg if name entered is
consisting of more than 15 characters
Please enter a name
Mumbai, Maharashtra
Name entered is too long
using System;
namespace ThrowingExceptions
{
class StringTooLong : Exception { }
class MyCheck
{
static public string chkinput(string x)
{
if (x.Length > 15)
throw (new StringTooLong());
return (x);
}
}
class Program
{
static void Main()
{
string name;
try
{
Console.WriteLine("Please enter a name ");
name = Console.ReadLine();
MyCheck.chkinput(name);
Console.WriteLine("Program ends here");
Console.ReadLine();
}
catch (StringTooLong)
{
Console.WriteLine("Name entered is too long");
Console.ReadLine();
}
}
}
}
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