PRACTICAL FILE

OF
.NET LAB

Submitted To Submitted By Raman Kaushik

Associate Professor Roll no.: B40519002
Dept. Of Computer Application BCA 6th SEM
SUB CODE: COAP3118

DEPARTMENT OF COMPUTER SCIENCE AND APPLICATION

 Index
S NO. Programs Date Signature
1. WAP to print “Hello World” using C#. 00-00-2021

2. WAP to get input and print an integer number using C#. 00-00-2022

3. WAP to display date and time in C#. 00-00-2022

4. WAP to program to implement conditional if statement. 00-00-2022

5. WAP to program to print a pattern of 0’s and 1’s in C#. 00-00-2022

6. WAP to calculate the factorial of a given number in C#. 00-00-2022

7. WAP to replace a character with another character in 00-00-2022

string in C#.

8. WAP to implement conditional switch statement in C#. 00-00-2022

9. WAP to compute the sum of the first 500 prime numbers 00-00-2022
in C#.

10 WAP to check if a given integer is within 20 of 100 or 200 00-00-2022

in C#.

11. WAP to check if the first element or the last element of 00-00-2022
the two arrays are equal or not in C#.

12. WAP to implement the concept of array list in C#. 00-00-2022

.NET Practical File

Program – 1

WAP to print “Hello World” using C#.

using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 3

.NET Practical File

Program – 2

WAP to input and print an integer number using C#.

using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter a number");
int num = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Entered Number is : " + num);
Console.ReadLine();
}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 4

.NET Practical File

Program – 3

WAP to display date and time in C#.

using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
NewMethod();
Console.ReadLine();

void NewMethod()
{
Console.WriteLine("Current Time is : " + DateTime.Now);
}

}
}
}

****************OUTPUT****************

Program – 4

RAMAN KAUSHIK (RK1B19) 5

.NET Practical File

WAP to program to implement conditional if statement in C#.

using System;

namespace programs
{
class Program
{

static void Main(string[] args)

{
Console.WriteLine("Enter First number : ");
int i = Convert.ToInt32(Console.ReadLine());
if (i > 10)
{
Console.WriteLine(i + " is Greater than " + 10);
}
else
{
Console.WriteLine(i + " is Less than " + 10);
}
Console.ReadLine();

}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 6

.NET Practical File

Program – 5

WAP to program to print a pattern of 0’s and 1’s in C#.

using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
var v = new Random();
var limit = v.Next(1, 10);
String str = "";
for (int i = 0; i < limit; i++)
{
str += getNum();
}
Console.WriteLine(str);
string getNum()
{
string str = "";
switch (v.Next(0, 3)) {
case 0:str = "00";
break;
case 1:str = "01";
break;
case 2:str = "10";
break;
default:str = "11";
break;
}
return str;
}
}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 7

.NET Practical File

Program – 6

WAP to calculate the factorial of a given number in C#.

using System;;
namespace programs
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter a number to find its factorial :
");
try
{
int f = Convert.ToInt32(Console.ReadLine());

if (f < 0)
{
Console.WriteLine("Negative numbers do not have
factorials");
}
else
{
Console.WriteLine("Factorial of " + f + " is : " +
FactorialIs(f));
}
Console.ReadLine();
}
catch(FormatException ex)
{
Console.WriteLine("An input of type integer must be
entered");
Console.WriteLine(ex.Message);
}

int FactorialIs(int factNum)

{
if (factNum == 0 || factNum == 1)
{
return 1;
}
else
{
return factNum * FactorialIs(factNum - 1);
}
}
}

RAMAN KAUSHIK (RK1B19) 8

.NET Practical File

}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 9

.NET Practical File

Program – 7
WAP to replace a character with another character in string in C#.
using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
try
{
Console.WriteLine("Enter a String : ");
string s = Console.ReadLine();
Console.WriteLine("Enter the charcter you want to
replace in '" + s + "'");
char c = Convert.ToChar(Console.ReadLine());
Console.WriteLine("Enter the character you want to
replace '" + c + "' with : ");
char c2 = Convert.ToChar(Console.ReadLine());
string s2 = s.Replace(c.ToString().ToUpper(),
c2.ToString().ToUpper());
s2 = s2.Replace(c.ToString().ToLower(),
c2.ToString().ToLower());
Console.WriteLine("New string is : " + s2);
Console.ReadLine();
}
catch (FormatException e)
{
Console.WriteLine(e.Message);
}
}
}
}
****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 10

.NET Practical File

Program – 8

WAP to implement conditional switch statement in C#.

using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("What would you like to buy");
getItemTemplate("Apples ", 0);
getItemTemplate("Bananas", 1);
getItemTemplate("Mangoes", 2);
getItemTemplate("Oranges", 3);
Console.Write("So, what you have chosen : ");
var input = Convert.ToInt32(Console.ReadLine());

switch (input)
{
case 0:
showOutput("Apples", 150);
getMoney(150);
break;
case 1:
showOutput("Bananas", 60);
getMoney(60);
break;
case 2:
showOutput("Mangoes", 120);
getMoney(120);
break;
case 3:
showOutput("Oranges", 80);
getMoney(80);
break;
default:
Console.WriteLine("Invalid input");
break;
}

void getItemTemplate(string item, int key)

{
Console.WriteLine("For " + item + ", Enter " + key);
}

RAMAN KAUSHIK (RK1B19) 11

.NET Practical File

void showOutput(string item, int cost)

{
Console.WriteLine("To get '" + item + "', give " + cost
+" rs.");
}

void getMoney(int amount)

{
int receivedMoney = 0;
Console.Write("Money : ");
receivedMoney = Convert.ToInt32(Console.ReadLine());
if (receivedMoney > amount)
{
Console.WriteLine("Here is your change : " +
(receivedMoney - amount));
receivedMoney = amount;
}
while (receivedMoney != amount)
{
Console.Write("Money : ");
receivedMoney =
Convert.ToInt32(Console.ReadLine());
if(receivedMoney < amount)
{
Console.WriteLine("Give " + (amount -
receivedMoney));
amount -= receivedMoney;
}else if (receivedMoney > amount)
{
Console.WriteLine("Here is your change : " +
(receivedMoney - amount));
receivedMoney = amount;
}
}
Console.WriteLine("\nHappy Shopping");
}
Console.ReadLine();
}
}
}

RAMAN KAUSHIK (RK1B19) 12

.NET Practical File

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 13

.NET Practical File

Program – 9

WAP to compute the sum of the first 500 prime numbers in C#.
using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{

int i = 1;
int primeOrNot = 3;
int sumOfPrimes = 2;
while(i < 500)
{
if (checkPrime(primeOrNot))
{
sumOfPrimes += primeOrNot;
i++;
}
primeOrNot += 2;
}
Console.WriteLine("Sum of first 500 primes is : " +
sumOfPrimes);
Console.ReadLine();

bool checkPrime(int i)
{
var limit = Convert.ToInt32(Math.Sqrt(i)) + 1;
for (int j = 2; j < limit; j++)
{
if(i % j == 0)
{
return false;
}
}
return true;
}
}
}
}

RAMAN KAUSHIK (RK1B19) 14

.NET Practical File

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 15

.NET Practical File

Program – 10

WAP to check if a given integer is within 20 of 100 or 200 in C#.

using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("To check if a number is within 20 of 100
& 200");
Console.Write("Enter the number : ");
int val = Convert.ToInt32(Console.ReadLine());
if(Math.Abs(100 - val) <= 20 || Math.Abs(200 - val) <= 20)
{
Console.WriteLine(true);
}
else
{
Console.WriteLine(false);
}
Console.ReadLine();
}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 16

.NET Practical File

Program – 11

WAP WAP to check if the first element or the last element of the two
arrays are equal or not in C#.
using System;

namespace programs
{
class Program
{
static void Main(string[] args)
{
int[] arr1 = { 1, 2, 3, 4, 5, 6, 7, };
int[] arr2 = { 1, 2, 3, 4, 5, 6, 7, 89 };
if(
arr1[arr1.Length -1] == arr2[arr2.Length -1]
||
arr1[0] == arr2[0]
)
{
Console.WriteLine(true);
}
else
{
Console.WriteLine(false);
}
Console.ReadLine();
}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 17

.NET Practical File

Program –12

WAP WAP to implement the concept of array list in C#.

using System;
using System.Collections;

namespace programs
{
class Program
{
static void Main(string[] args)
{
// creating object of type ArrayList()
ArrayList arrayList = new ArrayList();
arrayList.Add("Raman 1");
arrayList.Add("Raman 2");
arrayList.Add("Raman 3");
arrayList.Remove("Raman 3");
Console.WriteLine(arrayList);
Console.WriteLine("Lenght of the arraylist is : " +
arrayList.Count);

arrayList.Insert(1, "Raman 4");

arrayList.Insert(0, "Raman 5");
arrayList.Remove("Raman 4");
Console.WriteLine(arrayList);
Console.WriteLine("Lenght of the arraylist is : " +
arrayList.Count);
Console.ReadLine();
}
}
}

****************OUTPUT****************

RAMAN KAUSHIK (RK1B19) 18