Q) Write a C# program to find the value of z using if-else statement :
z = {
2xy + x if i= 1
3xy − x if i= 2
4xy/x if i= 3
5xy ∗ x if i= 4 }
sol/
using System;
public class FindZValue
{
public static void Main(string[] args)
{
int x, y, i;
Console.Write("Enter the value of x: ");
x = int.Parse(Console.ReadLine());
Console.Write("Enter the value of y: ");
y = int.Parse(Console.ReadLine());
Console.Write("Enter the value of i (1, 2, 3, or 4): ");
i = int.Parse(Console.ReadLine());
int z;
if (i == 1)
{
z = 2 * x * y + x;
}
else if (i == 2)
{
z = 3 * x * y - x;
}
else if (i == 3)
{
if (x == 0) // Handle division by zero
{
Console.WriteLine("Error: Division by zero is not allowed.");
return;
}
z = 4 * x * y / x;
}
else if (i == 4)
{
z = 5 * x * y * x;
}
else
{
Console.WriteLine("Invalid value for i. Please enter 1, 2, 3, or 4.");
return;
}
Console.WriteLine("The value of z is: " + z);
}
}
Q) Draw a flowchart and write C# program to calculate area for rectangle and test if the area is greater than
50 or not? using if-else..
Sol//
The flowchart for calculating the area of a rectangle and checking if it's greater than 50 using an if-else statement looks like this:
+-----------------+
| Start |
+-----------------+
v
+-----------------+
| Enter length |
+-----------------+
v
+-----------------+
| Enter width |
+-----------------+
v
+-----------------+
| Calculate area |
| (length * width) |
+-----------------+
v
+-----------------+
| Area > 50? |
+-----------------+
v
+---------+ +---------+
| Yes | ----> | No |
+---------+ +---------+
v v
+-----------------+ +-----------------+
| Print "Area > 50"| |Print "Area <= 50"|
+-----------------+ +-----------------+
v
+-----------------+
| End |
+-----------------+
C# program
Here's the C# program that implements the flowchart:
C#
using System;
public class RectangleArea
{
public static void Main(string[] args)
{
int length, width, area;
Console.Write("Enter the length of the rectangle: ");
length = int.Parse(Console.ReadLine());
Console.Write("Enter the width of the rectangle: ");
width = int.Parse(Console.ReadLine());
// Calculate area
area = length * width;
// Check area and print message
if (area > 50)
{
Console.WriteLine("The area of the rectangle is greater than 50.");
}
else
{
Console.WriteLine("The area of the rectangle is less than or equal to 50.");
}
}
}
Q) Write C# program to find the value of z using the formula: using if-else
Sol//
C#
using System;
public class FindZValue
{
public static void Main(string[] args)
{
int x, y, i;
double z; // Use double for floating-point calculations
Console.Write("Enter the value of x: ");
x = int.Parse(Console.ReadLine());
Console.Write("Enter the value of y: ");
y = int.Parse(Console.ReadLine());
Console.Write("Enter the value of i (1, 2, or 3): ");
i = int.Parse(Console.ReadLine());
if (i == 1)
{
z = Math.Sqrt(Math.Pow(x, 2) * Math.Pow(y, 2) + x * y + 5);
}
else if (i == 2)
{
z = Math.Abs(3 * Math.Pow(x, 2) - 2 * Math.Pow(y, 2) - 5);
}
else if (i == 3)
{
if (x == 0)
{
Console.WriteLine("Error: Division by zero is not allowed.");
return;
}
z = 4.0 * x * y / x; // Cast x to double for division accuracy
}
else
{
Console.WriteLine("Invalid value for i. Please enter 1, 2, or 3.");
return;
}
Console.WriteLine("The value of z is: " + z);
}
}
Q) Draw a flowchart to read two numbers x and y , and swap the two numbers if x divided by 4 using if-else.
Sol//
+----------------+
| Start |
+----------------+
v
+----------------+
| Read number x |
+----------------+
v
+----------------+
| Read number y |
+----------------+
v
+----------------+ +-----------------------+
| Is x divisible | | Yes (Swap) |
| by 4 (x % 4==0)? | ----> | Swap temporary = x; |
+----------------+ | x = y; |
v | y = temporary; |
+----------------+ +-----------------------+
v v
+----------------+ +----------------+
| No | ----> | Print x and y |
+----------------+ | (unchanged) |
v +----------------+
+----------------+ | End |
| Print x and y | v
+----------------+ +----------------+
Q/ Write a C# program to read two integer numbers (a, b) and swap the two numbers if a and b are odd and a is divided by 5.using if-else?
Sol//
using System;
public class SwapIfOddAndDivisibleByFive
{
public static void Main(string[] args)
{
// Read two integer numbers from the user
Console.Write("Enter the first number (a): ");
int a = int.Parse(Console.ReadLine());
Console.Write("Enter the second number (b): ");
int b = int.Parse(Console.ReadLine());
// Check if both a and b are odd and a is divisible by 5
if (a % 2 != 0 && b % 2 != 0 && a % 5 == 0)
{
// Swap the values of a and b
int temp = a;
a = b;
b = temp;
Console.WriteLine("Numbers swapped (both odd and first is divisible by 5):");
}
else
{
Console.WriteLine("Numbers not swapped (conditions not met):");
}
// Print the swapped or original values
Console.WriteLine($"a = {a}");
Console.WriteLine($"b = {b}");
}
}
Q / Write a C# program to read the student’s name, gender, three scores and find the average of the scores then print “pass” when the average is greater than 50, otherwise print “failed”.using if-else?
Sol//
using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter student's name:");
string name = Console.ReadLine();
Console.WriteLine("Enter student's gender (M/F):");
char gender = Convert.ToChar(Console.ReadLine());
Console.WriteLine("Enter three scores:");
double score1 = Convert.ToDouble(Console.ReadLine());
double score2 = Convert.ToDouble(Console.ReadLine());
double score3 = Convert.ToDouble(Console.ReadLine());
// Calculating the average of the scores
double average = (score1 + score2 + score3) / 3;
// Printing whether the student passed or failed based on the average score
if (average > 50)
{
Console.WriteLine("Pass");
}
else
{
Console.WriteLine("Failed");
}
}
}
Q/ Write C# program to find the count of all numbers less than 50
and find the summation of all numbers greater than or equal 50 , in a
set of numbers ended by zero number. using if-else?
Sol//
using System;
class Program
{
static void Main(string[] args)
{
int countLessThan50 = 0;
int sumGreaterThanOrEqualTo50 = 0;
Console.WriteLine("Enter a set of numbers (enter 0 to end):");
while (true)
{
int num = Convert.ToInt32(Console.ReadLine());
if (num == 0)
break;
if (num < 50)
{
countLessThan50++;
}
else
{
sumGreaterThanOrEqualTo50 += num;
}
}
Console.WriteLine($"Count of numbers less than 50: {countLessThan50}");
Console.WriteLine($"Summation of numbers greater than or equal to 50: {sumGreaterThanOrEqualTo50}");
}
}
Q/ Write C# program to find the value of z using the formula: using if-else
Sol//
using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter the values of a, b, and n:");
// Reading values of a, b, and n from the user
double a = Convert.ToDouble(Console.ReadLine());
double b = Convert.ToDouble(Console.ReadLine());
int n = Convert.ToInt32(Console.ReadLine());
double sum = 0;
// Computing the sum using if-else statements
for (int i = 2; i <= n; i++)
{
if (i == 2)
{
sum += 2 * (a + b) / (3 * b);
}
else
{
sum += i * (a + b) / ((i + 1) * b);
}
}
Console.WriteLine($"The value of Z is: {sum}");
}
}
Q/ Write C# program to find the value of z using the formula: using if-else
Sol//
using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter the value of x:");
double x = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter the value of y:");
double y = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter the value of n:");
int n = Convert.ToInt32(Console.ReadLine());
double z = 0;
for (int i = 2; i <= n; i++)
{
if (i == 2)
{
z += (2 * Math.Pow(x, 3)) / (2 + y);
}
else
{
z += (i * Math.Pow(x, i + 1)) / (i + y);
}
}
Console.WriteLine($"The value of z is: {z}");
}
}
Q) Write a C# program to find the value of Y? using if-else.
Sol//
using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter the value of X:");
double x = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter the value of n:");
int n = Convert.ToInt32(Console.ReadLine());
double y = 5;
for (int i = 1; i <= n; i++)
{
if (i == 1)
{
y += (2 * Math.Pow(x, i)) / i;
}
else if (i == 2)
{
y += (4 * Math.Pow(x, i)) / i;
}
else
{
y += ((i + 1) * Math.Pow(x, i)) / i;
}
}
Console.WriteLine($"The value of Y is: {y}");
}
}
Q) Write C# program to find the average of set numbers ended by number divided by 3. using if-else?
Sol//
using System;
class Program
{
static void Main(string[] args)
{
int sum = 0;
int count = 0;
Console.WriteLine("Enter numbers (end with a number divisible by 3):");
int num;
do
{
num = Convert.ToInt32(Console.ReadLine());
// Check if the number is divisible by 3
if (num % 3 == 0)
{
break; // Exit the loop if divisible by 3
}
sum += num;
count++;
} while (true);
// Calculate and display the average
if (count > 0)
{
double average = (double)sum / count;
Console.WriteLine($"Average of the numbers: {average}");
}
else
{
Console.WriteLine("No numbers entered.");
}
}
}