Program to print the n terms of fibonacci series.

#include<stdio.h>

#include<conio.h>

void main()

{

                int a,b,c,i,n;

                a=0;

                b=1;

                clrscr();

                printf("\n Enter the number of terms");

                scanf("%d", &n);

                if(n == 1)

                          printf("\n  %d  ",a);

                else if(n>=2)

                {

                                  printf("\n  %d  \t  %d ",a,b);

                                  for(i=3;i<=n;i++)

                                  {

                                                    c=a+b;

                                                    printf("\t  %d",c);

                                                    a=b;

                                                    b=c;

                                   }

                 }

             

                 getch();

 }

Program to find whether a number is palindrome or not.

#include<stdio.h>

#include<conio.h>

void main()

{

                long rev = 0,n, num , rem;

                clrscr();

                printf("\n Enter the number");

                scanf("%ld",&num);

                n=num;

                while(n>0)

                {

                              rem= n % 10;

                              n=n/10; 

                              rev=rev*10 + rem;

                }

                

                if(rev = = num)

                             printf(" \n Number %ld is palindrome", num);

                else

                             printf(" \n Number %ld is not palindrome", num);                    

                getch();

}               

Program to reverse a number.

#include<stdio.h>

#include<conio.h>

void main()

{

                long rev = 0, rem , n;

                clrscr();

                printf("\n Enter the number ");

                scanf("%ld",&n);

                while(n>0)

                {

                                 rem=n%10;

                                 n=n/10;  

                                 rev=rev*10 +rem;

                }

                printf("\n The reverse number = %ld",rev);

 }

Program to calculate the average of given n number.

#include<stdio.h>

#include<conio.h>

void main()

{

               int i,n,sum=0,x;

               float avg;

               printf("\n How many numbers ");

               scanf(" %d ",&n);

               for(i=1;i<=n;i++)

               {

                               printf("\n Eneter %d number ",i);

                               scanf("%d",&x);

                               sum = sum + x;

                }

               

                avg=sum/n;

                printf("\n The average of numbers = %f",avg);

                getch();

}

    

 

Program to print first 10 multiples of an integer.

#include<stdio.h>

#include<conio.h>

void main()

{

                int n,i;

                clrscr();

                printf("\n Enter a integer number");

                scanf("%d",&n);

                for(i=1;i<=10;i++)

                {

                               printf("\n %d * %d = %d ",n,i,n*i);

                 }

                 getch();

}

Program to calculate the factorial of a number.

#include<stdio.h>

#include<conio.h>

void main()

{

                int n,i=1,fact=1;

                clrscr();

                printf("\n Enter  a number ");

                scanf("%d",&n);

                while(i<=n)

                {

                                fact=fact * i;

                                i++;

                 }

                 printf("\n Factorial of  %d = %d",n,fact);

                 getch();

}

NOTE :=  Factorial of a number can be calculated  as

                  5! = 5 * 4 * 3 * 2 * 1 = 120.

Program to display digits 1 to n.

#include<stdio.h>

#include<conio.h>

void main()

{

                  int n, i=1;

                  clrscr();

                  printf("\n Enter the last digit");

                  scanf("%d",&n);

                  while(i<=n)

                  {

                                  printf("\n %d",i);

                                  i++;

                  }

                  getch();

}