Program to calculate sum of series using for loop without 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).

 where n is the value entered by user.

 =>Explicit type conversion

*/

#include<stdio.h>
#include<conio.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+(float)1/(i*i); //Explicit type conversion

}

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

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

getch();
}