Program 1: Program to perform arithmetic operation
using System;
class ArithmeticOperations
static void Main()
Console.Write("Enter first number: ");
double num1 = Convert.ToDouble(Console.ReadLine());
Console.Write("Enter second number: ");
double num2 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Choose operation: +, -, *, /");
char operation = Convert.ToChar(Console.ReadLine());
double result = 0;
switch (operation)
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
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case '*':
result = num1 * num2;
break;
case '/':
if (num2 != 0)
result = num1 / num2;
else
Console.WriteLine("Error! Division by zero is not allowed.");
return;
default:
Console.WriteLine("Invalid operation selected.");
return;
Console.WriteLine($"Result: {result}");
OUTPUT:
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Program 2: Program to print pyramid pattern by using loop
using System;
class PyramidPattern
static void Main()
int n = 5; // Number of rows for the pyramid
for (int i = 1; i <= n; i++)
// Print spaces
for (int j = 1; j <= n - i; j++)
Console.Write(" ");
// Print stars
for (int k = 1; k <= (2 * i - 1); k++)
Console.Write("*");
// Move to the next line
Console.WriteLine();
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OUTPUT:
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Program 2: Program to print pyramid by using go to statement
using System;
class PyramidPattern
static void Main()
int n = 5; // Number of rows in the pyramid
int i = 1, j, space;
StartRow:
if (i > n) return; // Stop when all rows are printed
space = n - i; // Calculate spaces before stars
j = 1;
PrintSpace:
if (space > 0)
Console.Write(" ");
space--;
goto PrintSpace;
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PrintStar:
if (j <= (2 * i - 1)) // Print stars
Console.Write("*");
j++;
goto PrintStar;
Console.WriteLine(); // Move to the next line
i++;
goto StartRow; // Repeat for next row
OUTPUT:
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Program 3: Program to display grade of marks by using switch statement
using System;
class Program
static void Main()
Console.Write("Enter marks (0-100): ");
int marks = Convert.ToInt32(Console.ReadLine());
string grade = marks switch
>= 90 and <= 100 => "A",
>= 80 and < 90 => "B",
>= 70 and < 80 => "C",
>= 60 and < 70 => "D",
>= 50 and < 60 => "E",
>= 0 and < 50 => "F",
_ => "Invalid marks"
};
Console.WriteLine("Your grade is: " + grade);
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OUTPUT:
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Program 4: Program to find largest number among three input numbers
using System;
class Program
static void Main()
// Prompt user for input
Console.WriteLine("Enter three numbers:");
// Read and convert inputs
Console.Write("Enter first number: ");
double num1 = Convert.ToDouble(Console.ReadLine());
Console.Write("Enter second number: ");
double num2 = Convert.ToDouble(Console.ReadLine());
Console.Write("Enter third number: ");
double num3 = Convert.ToDouble(Console.ReadLine());
// Determine the largest number
double largest = (num1 > num2) ? ((num1 > num3) ? num1 : num3) : ((num2 > num3) ?
num2 : num3);
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// Display the result
Console.WriteLine($"The largest number is: {largest}");
OUTPUT:
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Program 5: Program to find volume of cube, cylinder and cuboid by using
method overloading
using System;
class VolumeCalculator
// Method to calculate the volume of a cube
public double CalculateVolume(double side)
return Math.Pow(side, 3);
// Method to calculate the volume of a cylinder
public double CalculateVolume(double radius, double height)
return Math.PI * Math.Pow(radius, 2) * height;
// Method to calculate the volume of a cuboid
public double CalculateVolume(double length, double width, double height)
return length * width * height;
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}
class Program
static void Main()
VolumeCalculator calculator = new VolumeCalculator();
// Cube volume
Console.WriteLine("Volume of Cube: " + calculator.CalculateVolume(5));
// Cylinder volume
Console.WriteLine("Volume of Cylinder: " + calculator.CalculateVolume(3, 7));
// Cuboid volume
Console.WriteLine("Volume of Cuboid: " + calculator.CalculateVolume(4, 5, 6));
OUTPUT:
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Program 6: Program to find the area of rectangle by using constructor
using System;
class Rectangle
private double length;
private double width;
// Constructor
public Rectangle(double l, double w)
length = l;
width = w;
// Method to calculate area
public double GetArea()
return length * width;
// Method to display area
public void Display()
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Console.WriteLine("Length: " + length);
Console.WriteLine("Width: " + width);
Console.WriteLine("Area of Rectangle: " + GetArea());
class Program
static void Main()
Console.Write("Enter the length of the rectangle: ");
double length = Convert.ToDouble(Console.ReadLine());
Console.Write("Enter the width of the rectangle: ");
double width = Convert.ToDouble(Console.ReadLine());
// Creating object and passing values to constructor
Rectangle rect = new Rectangle(length, width);
// Display the area
rect.Display();
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OUTPUT:
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Program 7: Program to implement multiple inheritance by using interface
using System;
interface IAddition
int Add(int a, int b);
interface IMultiplication
int Multiply(int a, int b);
class Calculator : IAddition, IMultiplication
public int Add(int a, int b)
return a + b;
public int Multiply(int a, int b)
return a * b;
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}
class Program
static void Main()
Calculator calc = new Calculator();
int num1 = 10, num2 = 5;
Console.WriteLine($"Addition of {num1} and {num2}: {calc.Add(num1, num2)}");
Console.WriteLine($"Multiplication of {num1} and {num2}: {calc.Multiply(num1, num2)}");
OUTPUT:
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Program 8: Program to implement overloading unary operator
using System;
class Number
private int value;
// Constructor
public Number(int val)
value = val;
// Overloading Unary Plus (+)
public static Number operator +(Number n)
return new Number(+n.value);
// Overloading Unary Minus (-)
public static Number operator -(Number n)
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return new Number(-n.value);
// Overloading Logical NOT (!)
public static bool operator !(Number n)
return n.value == 0;
// Overloading Increment Operator (++)
public static Number operator ++(Number n)
return new Number(n.value + 1);
// Overloading Decrement Operator (--)
public static Number operator --(Number n)
return new Number(n.value - 1);
// Display Method
public void Display()
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Console.WriteLine("Value: " + value);
// Main Method to Test
public static void Main()
Number num1 = new Number(10);
Number num2 = new Number(-5);
Number num3 = new Number(0);
Console.WriteLine("Original Values:");
num1.Display();
num2.Display();
num3.Display();
Console.WriteLine("\nApplying Unary Operators:");
Number posNum = +num1;
Number negNum = -num1;
Number incremented = ++num1;
Number decremented = --num2;
posNum.Display();
negNum.Display();
incremented.Display();
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decremented.Display();
Console.WriteLine("\nLogical NOT Operator:");
Console.WriteLine("!num1: " + !num1);
Console.WriteLine("!num3: " + !num3); // Should return true as num3 is 0
OUTPUT:
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Program 9: Program to implement multiple catch statement
using System;
class MultipleCatchDemo
static void Main()
try
Console.WriteLine("Enter a number: ");
int num1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter another number: ");
int num2 = Convert.ToInt32(Console.ReadLine());
// Division operation
int result = num1 / num2;
Console.WriteLine($"Result: {result}");
// Array index access
int[] arr = { 1, 2, 3 };
Console.WriteLine("Accessing array element at index 5: " + arr[5]);
catch (DivideByZeroException ex)
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{
Console.WriteLine("Error: Division by zero is not allowed.");
Console.WriteLine("Exception Details: " + ex.Message);
catch (FormatException ex)
Console.WriteLine("Error: Invalid input format. Please enter numeric values.");
Console.WriteLine("Exception Details: " + ex.Message);
catch (IndexOutOfRangeException ex)
Console.WriteLine("Error: Array index is out of bounds.");
Console.WriteLine("Exception Details: " + ex.Message);
catch (Exception ex)
Console.WriteLine("A general exception occurred.");
Console.WriteLine("Exception Details: " + ex.Message);
finally
Console.WriteLine("Execution completed.");
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}
OUTPUT:
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Program 1O: Program to implement single inheritance
using System;
class Parent
protected int num1, num2;
public void SetValues(int a, int b)
num1 = a;
num2 = b;
public void DisplayNumbers()
Console.WriteLine("Number 1: " + num1);
Console.WriteLine("Number 2: " + num2);
class Child : Parent
public int CalculateSum()
return num1 + num2;
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}
class Program
static void Main()
Child obj = new Child();
obj.SetValues(10, 20);
obj.DisplayNumbers();
Console.WriteLine("Sum: " + obj.CalculateSum());
OUTPUT:
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