1.
Print Numbers from 1 to 10
using System;
class Program
{
static void Main()
{
for (int i = 1; i <= 10; i++)
{
Console.WriteLine(i);
}
}
}
2. Print Even Numbers from 1 to N
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int n = Convert.ToInt32(Console.ReadLine());
for (int i = 1; i <= n; i++)
{
if (i % 2 == 0)
{
Console.WriteLine(i);
}
}
}
}
3. Sum of First N Natural Numbers
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int n = Convert.ToInt32(Console.ReadLine());
int sum = 0;
for (int i = 1; i <= n; i++)
{
sum += i;
}
Console.WriteLine("Sum: " + sum);
}
}
4. Find Factorial of a Number
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int n = Convert.ToInt32(Console.ReadLine());
int factorial = 1;
for (int i = 1; i <= n; i++)
{
factorial *= i;
}
Console.WriteLine("Factorial: " + factorial);
}
}
5. Reverse the Digits of a Number
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int number = Convert.ToInt32(Console.ReadLine());
int reverse = 0;
while (number > 0)
{
int remainder = number % 10;
reverse = (reverse * 10) + remainder;
number /= 10;
}
Console.WriteLine("Reversed number: " + reverse);
}
}
6. Check if a Number is Prime
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int number = Convert.ToInt32(Console.ReadLine());
bool isPrime = true;
if (number < 2)
{
isPrime = false;
}
else
{
for (int i = 2; i <= Math.Sqrt(number); i++)
{
if (number % i == 0)
{
isPrime = false;
break;
}
}
}
if (isPrime)
Console.WriteLine("Prime number");
else
Console.WriteLine("Not a prime number");
}
}
7. Sum of Digits of a Number
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int number = Convert.ToInt32(Console.ReadLine());
int sum = 0;
while (number > 0)
{
sum += number % 10;
number /= 10;
}
Console.WriteLine("Sum of digits: " + sum);
}
}
8. Print Multiplication Table of a Number
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int number = Convert.ToInt32(Console.ReadLine());
for (int i = 1; i <= 10; i++)
{
Console.WriteLine($"{number} x {i} = {number * i}");
}
}
}
9. Count the Number of Digits in a Number
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int number = Convert.ToInt32(Console.ReadLine());
int count = 0;
while (number != 0)
{
number /= 10;
count++;
}
Console.WriteLine("Number of digits: " + count);
}
}
10. Check if a Number is a Palindrome
using System;
class Program
{
static void Main()
{
Console.Write("Enter a number: ");
int number = Convert.ToInt32(Console.ReadLine());
int originalNumber = number;
int reverse = 0;
while (number > 0)
{
int remainder = number % 10;
reverse = (reverse * 10) + remainder;
number /= 10;
}
if (originalNumber == reverse)
Console.WriteLine("Palindrome");
else
Console.WriteLine("Not a palindrome");
}
}
