C# Basic Programs

byArth •
0

 



1) Print Hello World! 

Code: 
namespace HelloWorld
{
    class Hello {         
        static void Main(string[] args)
        {
            System.Console.WriteLine("Hello World!");
        }
    }
}


2) Fibonacci Series 

Code: 
using System;  
  public class FibonacciExample  
   {  
     public static void Main(string[] args)  
      {  
         int n1=0,n2=1,n3,i,number;    
         Console.Write("Enter the number of elements: ");    
         number = int.Parse(Console.ReadLine());  
         Console.Write(n1+" "+n2+" "); //printing 0 and 1    
         for(i=2;i<number;++i) //loop starts from 2 because 0 and 1 are already printed    
         {    
          n3=n1+n2;    
          Console.Write(n3+" ");    
          n1=n2;    
          n2=n3;    
         }    
      }  
   }


3) Prime Number Program 

Code: 
using System;  
  public class PrimeNumberExample  
   {  
     public static void Main(string[] args)  
      {  
          int n, i, m=0, flag=0;    
          Console.Write("Enter the Number to check Prime: ");    
          n = int.Parse(Console.ReadLine());  
          m=n/2;    
          for(i = 2; i <= m; i++)    
          {    
           if(n % i == 0)    
            {    
             Console.Write("Number is not Prime.");    
             flag=1;    
             break;    
            }    
          }    
          if (flag==0)    
           Console.Write("Number is Prime.");       
     }  
   }


4) Palindrome program 

Code: 
using System;  
  public class PalindromeExample  
   {  
     public static void Main(string[] args)  
      {  
          int n,r,sum=0,temp;    
          Console.Write("Enter the Number: ");   
          n = int.Parse(Console.ReadLine());  
          temp=n;      
          while(n>0)      
          {      
           r=n%10;      
           sum=(sum*10)+r;      
           n=n/10;      
          }      
          if(temp==sum)      
           Console.Write("Number is Palindrome.");      
          else      
           Console.Write("Number is not Palindrome");     
    }  
  }


5) Factorial program 


Code: 
using System;  
  public class FactorialExample  
   {  
     public static void Main(string[] args)  
      {  
       int i,fact=1,number;      
       Console.Write("Enter any Number: ");      
       number= int.Parse(Console.ReadLine());     
       for(i=1;i<=number;i++){      
        fact=fact*i;      
       }      
       Console.Write("Factorial of " +number+" is: "+fact);    
     }  
  }


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