C# Programs - c# - c# tutorial - c# net
C# String Programs
- C# Program to Reverse a string
- C# Program To Find The Count Of Sub-string "SHL" In A Given String
- C# Program to Find Palindrome or not
- C# Program to Reverse a number
- C# Program to Find duplicate characters in a string
- C# Program to Reverse each word of the sentence (string)
- C# Program to Remove characters in a string
- C# Program to Replace a character
- C# Program to Print pattern
- C# Program to Number into string
How to write programs in C# ?
- C# programs are frequently asked in the interview.
- These programs can be asked from basics, array, string, control statements, file handling etc. Let's see the list of top C# programs.
class-object-contructor-member-function-in-csharp in c# Example
C# program to enter number and print Fibonacci series upto that nth number:
using System;
class Program
{
static void Main(string[] args)
{
int n, first = 0, second = 1, third = 0;
Console.Write("Enter a number : ");
n = Convert.ToInt32(Console.ReadLine());
Console.Write("First {0} Fibonacci numbers {1} {2} ",n, first, second);
for (int i = 3; i <= n; i++)
{
third = first + second;
Console.Write("{0} ", third);
first = second;
second = third;
}
}
}
C# examples - Output :
Enter a number : 10
First 10 Fibonacci numbers : 0 1 1 2 3 5 8 13 21 34
Enter a number : 5
First 5 Fibonacci numbers : 0 1 1 2 3
C# Program to Check Whether the Given Number is a Prime number if so then Display its Largest Factor
/*
* C# Program to Check Whether the Given Number is a Prime number if so then
* Display its Largest Factor
*/
using System;
namespace example
{
class prime
{
public static void Main()
{
Console.Write("Enter a Number : ");
int num;
num = Convert.ToInt32(Console.ReadLine());
int k;
k = 0;
for (int i = 1; i <= num; i++)
{
if (num % i == 0)
{
k++;
}
}
if (k == 2)
{
Console.WriteLine("Entered Number is a Prime Number and the Largest Factor is {0}",num);
}
else
{
Console.WriteLine("Not a Prime Number");
}
Console.ReadLine();
}
}
}
output:
Enter a Number : 23
Entered Number is a Prime Number and the Largest Factor is 23
Program to Check the Number Is Palindrome Or Not
class Program {
static void Main(string[] args) {
int num, rem, sum = 0, temp;
//clrscr();
Console.WriteLine("\n >>>> To Find a Number is Palindrome or not <<<< ");
Console.Write("\n Enter a number: ");
num = Convert.ToInt32(Console.ReadLine());
temp = num;
while (num > 0) {
rem = num % 10; //for getting remainder by dividing with 10
num = num / 10; //for getting quotient by dividing with 10
sum = sum * 10 + rem;
/*multiplying the sum with 10 and adding
remainder*/
}
Console.WriteLine("\n The Reversed Number is: {0} \n", sum);
if (temp == sum) //checking whether the reversed number is equal to entered number
{
Console.WriteLine("\n Number is Palindrome \n\n");
} else {
Console.WriteLine("\n Number is not a palindrome \n\n");
}
Console.ReadLine();
}
}
C# examples - Output :
To Find A Number is palindrome or not
Enter a Number: 1221
The Reversed Number is: 1221
Number is Palindrome
C# Program to Generate the Factorial of Given Number
/*
* C# Program to Generate the Factorial of Given Number
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace factorial
{
class Program
{
static void Main(string[] args)
{
int i, number, fact;
Console.WriteLine("Enter the Number");
number = int.Parse(Console.ReadLine());
fact = number;
for (i = number - 1; i >= 1; i--)
{
fact = fact * i;
}
Console.WriteLine("\nFactorial of Given Number is: "+fact);
Console.ReadLine();
}
}
}
output:
Enter the Number
6
Factorial of Given Number is: 720
C# Program to Check Whether the Entered Number is an Armstrong Number or Not
/*
* C# Program to Check Whether the Entered Number is an Armstrong Number or Not
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication6
{
class Program
{
static void Main(string[] args)
{
int number, remainder, sum = 0;
Console.Write("enter the Number");
number = int.Parse(Console.ReadLine());
for (int i = number; i > 0; i = i / 10)
{
remainder = i % 10;
sum = sum + remainder*remainder*remainder;
}
if (sum == number)
{
Console.Write("Entered Number is an Armstrong Number");
}
else
Console.Write("Entered Number is not an Armstrong Number");
Console.ReadLine();
}
}
}
C# examples - Output :
Enter the Number: 371
Entered Number is an Armstrong Number
C# Program to Find Sum of Digits of a Number using Recursion
/*
* C# Program to Find Sum of Digits of a Number using Recursion
*/
using System;
class program
{
public static void Main()
{
int num, result;
pro pg = new pro();
Console.WriteLine("Enter the Number : ");
num=int.Parse(Console.ReadLine());
result =pg.sum(num);
Console.WriteLine("Sum of Digits in {0} is {1}", num, result);
Console.ReadLine();
}
}
class pro
{
public int sum(int num)
{
if (num != 0)
{
return (num % 10 + sum(num / 10));
}
else
{
return 0;
}
}
}
output:
Enter the Number :
234
Sum of Digits in 234 is 9
C# Program to Get a Number and Display the Number with its Reverse
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* C# Program to Get a Number and Display the Number with its Reverse
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program
{
class Program
{
static void Main(string[] args)
{
int num, reverse = 0;
Console.WriteLine("Enter a Number : ");
num = int.Parse(Console.ReadLine());
while (num != 0)
{
reverse = reverse * 10;
reverse = reverse + num % 10;
num = num / 10;
}
Console.WriteLine("Reverse of Entered Number is : "+reverse);
Console.ReadLine();
}
}
}
Output:
Enter a Number : 123
Reverse of Entered Number : 321
C# Program to Print Alphabet Triangle
using System;
public class PrintExample
{
public static void Main(string[] args)
{
char ch='A';
int i, j, k, m;
for(i=1; i<=5; i++)
{
for(j=5; j>=i; j--)
Console.Write(" ");
for(k=1;k<=i;k++)
Console.Write(ch++);
ch--;
for(m=1;m<i;m++)
Console.Write(--ch);
Console.Write("\n");
ch='A';
}
}
}
C# examples - Output :
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA