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();

}