Program to calculate sum of the odd number series using for loop in C.

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/*program to calculate sum of the series 
1+3+5+7+9.......+n
odd number series
where n is the limit entered by user.
*/

#include<stdio.h>
#include<conio.h>
void main()
{
int i,sum,num;

clrscr();

sum=0;

printf("\nEnter limit : ");
scanf("%d",&num);

printf("\nOdd Number Series ");

printf("\nSeries= ");
for(i=1;i<=num;i++)
{

if(i%2!=0)
{
printf(" + %d ",i);
sum=sum+i;
}

}
printf("\n\nSum of series= %d",sum);

getch();
}

Program to calculate sum of factorial series using for loop and power function in C.

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/*Program to calculate sum of series

 1/1!+1/2!+1/3!+.......+1/n!.
 by power function.

 where n is the value entered by user
*/

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n,j,mul;
float sum;
clrscr();
sum=0;

printf("\nEnter limit number : ");
scanf("%d",&n);


printf("\nSeries=");

printf("\n---------------------\n");

for(i=1;i<=n;i++)
{
mul=1;
printf(" +1/%d! ",i);

for(j=1;j<=i;j++)
{
mul=mul*j;
}

sum=sum+pow(mul,-1); //power function

}

printf("\n---------------------\n");

printf("\nSum of series= %.3f",sum);

getch();
}

Program to calculate sum of series using for loop and power function in C,

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/*Program to calculate sum of series

 1/(1square)+1/(2 square)+1/(3 square)+.......+1/(n square).
 by power function.

 where n is the value entered by user
*/

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n;
float sum;
clrscr();
sum=0;

printf("\nEnter limit number : ");
scanf("%d",&n);


printf("\nSeries=");

printf("\n---------------------\n");

for(i=1;i<=n;i++)
{

printf(" +1/(%d*%d) ",i,i);
sum=sum+pow(i,-2); //power function

}

printf("\n---------------------\n");

printf("\nSum of series= %.3f",sum);

getch();
}

Program to calculate sum of series using for loop in C.

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/*Program to calculate sum of series

 1/(1square)+1/(2 square)+1/(3 square)+.......+1/(n square).
 by power function.

 where n is the value entered by user
*/

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n;
float sum;
clrscr();
sum=0;

printf("\nEnter limit number : ");
scanf("%d",&n);


printf("\nSeries=");

printf("\n---------------------\n");

for(i=1;i<=n;i++)
{

printf(" +1/(%d*%d) ",i,i);
sum=sum+pow(i,-2); //power function

}

printf("\n---------------------\n");

printf("\nSum of series= %.3f",sum);

getch();
}

Program to calculate sum of series using for loop in C.

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/*Program to calculate sum of series

 1/1+1/2+1/3+.......+1/n.
 by power function.

 where n is the value entered by user
*/

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n;
float sum;
clrscr();
sum=0;

printf("\nEnter limit number : ");
scanf("%d",&n);


printf("\nSeries=");

printf("\n---------------------\n");

for(i=1;i<=n;i++)
{

printf(" +1/%d ",i);
sum=sum+pow(i,-1); //power function

}

printf("\n---------------------\n");

printf("\nSum of series= %.3f",sum);

getch();
}

Program to print factorial of any input number with fact as integer using do while loop in C.

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/*Program to print factorial of any input number*/

#include<stdio.h>
#include<conio.h>
void main()
{
int num,fact;
/* If we take fact as integer, it can not be able
to store factorial of value greater than 8 */
fact=1;
clrscr();

printf("\nEnter any number:");
scanf("%d",&num);

clrscr();  //for clear screen

printf("\n-------------------------------");
printf("\nNumber entered is: %d",num);
printf("\n-------------------------------");
printf("\n(When Fact as integer)\n");
printf("\nFactorial of %d is:",num);
printf("\n-----------------------------\n");
do
{
if(num==0)
{
printf("\n1"); //factorial of 0 is 1
break;
}
fact=fact*num;
num--;
}while(num>=1);

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

printf("\n------------------------------");

getch();
}