Write a program to display digit of a five-digit no

 Write a program to receive a five-digit no and display as like 24689:

2

4

6

8

9

Program in C Language

#include<stdio.h>

#include<conio.h>

#include <math.h>

void main()

{

      int num,i;

    printf ("Input a five digit number: ");

    scanf ("%d", &num);

    for (i = 4; num > 0; i--)

    {

        printf ("%d", num / (int)pow (10, i));

        num = num % (int) pow (10, i);

        printf ("\n");

    }

    getch();

}

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Write a program to draw the following figure:

3 2 1

21

1

*

**

***

Program in C Language

#include<stdio.h>
#include<conio.h>
void main()
{
     int i,j;
     for(i=3;i>=1;i--)
     {

           for(j=i;j>=1;j--)
          {
           printf("%d",j);
          }
          printf("\n");
     }
     for(i=1;i<=3;i++)
     {

           for(j=1;j<=i;j++)
          {
           printf("*");
          }
          printf("\n");
     }
getch();
}

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Write a function that return sum of all the odd digits of a given positive no entered through keyboard

#include<stdio.h>

#include<conio.h>

int sumodd(int num)

{

     int sum=0,i;

     for(i=0;i<=num;i++)

     {

          if(i%2!=0)

          {

               sum=sum+i;

               printf("%d,",i);

          }

     }

     return sum;

}

void main()

{

 int n,sum;

printf("enter a number\n");

scanf("%d",&n);

sum=sumodd(n);

printf("\n sum of odd number is %d",sum);

getch();

}

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 Write a program to find sum of Fibonacci series using function.

#include<conio.h>

#include<stdio.h>

int sumfab(int num)

{

     int a=1,b=1,sum=2,i,c;

     printf("%d,%d,",a,b);

     for(i=3;i<=num;i++)

     {

          c=a+b;

          sum=sum+c;

          a=b;

          b=c;

          printf("%d,",c);

     }

     return sum;

}

void main()

{

     int n,sum;

     printf("enter a number \n");

     scanf("%d",&n);

     sum=sumfab(n);

     printf("the sum is %d",sum);

     getch();

}

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 Write a program to calculate the factorial for given number using function.

Factorial for given number without using function

#include<stdio.h>

#include<conio.h>

void main()

{

     int i,n;

     int fact=1;

     printf("enter the number\n");

     scanf("%d",&n);

     for(i=n;i>=1;i--)

     {

          fact=fact*i;

     }

     printf("%d",fact);

}

Factorial for given number using function

#include<stdio.h>

#include<conio.h>

int fact(int num)

{

     int f=1,i;

     for(i=1;i<=num;i++)

     {

          f=f*i;

     }

     return f;

}

void main()

{

     int fa,n;

     printf("\n enter the number \n");

     scanf("%d",&n);

     fa=fact(n);

     printf("\n Factorial of number%d is %d",n,fa);

     getch();

}

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Write a program to print the entire prime no between 1 and 300. 

Program in C language

#include<stdio.h>

#include<conio.h>

int IsPrime(int num)

{

     int i,b=1;

     for(i=2;i<num;i++)

     {

          if(num%i==0)

          {

               b=0;

               break;

          }

     }

     return b;

}

void main()

{

int i;

for(i=2;i<=100;i++)

{

 if(IsPrime(i))

{

     printf("%d\n",i);

}

}

}

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Write a program to generate sum of series 1!+2!+3!+--------------n!

In order generate sum of series 1!+2!+3!+--------------n! there is need to take help of function that can able to calculate the factorial of any number 

Program in C language

#include<stdio.h>

#include<conio.h>

int fact(int n)

{

     if(n==1)

          return 1;

     else

          return n*fact(n-1);

}

void main()

{

     int n,factorial,sum=0,i;

     printf("enter a number \n");

     scanf("%d",&n);

     for(i=1;i<=n;i++)

     {

        factorial=fact(i);

        sum=sum+factorial;

     }

     printf("Sum of the given series is %d",sum);

     getch();

}

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