WEEK-2 PROGRAM

/* week-2
a) c program to the equation
1- x^2/2! +x^4/4! -x^6/6! +x^8/8! -x^10/10!
*/
#include <stdio.h>
void main()
{
int n;
float x;
float sum=1.0;
int j;
printf("Enter a number:");
scanf("%f",&x);
for(n=2;n<=10;n=n+2)
{
float k=1.0, i=1.0,r;
// for finding x^n
for(j=0;j<n;j++)
{
i=i*x;
}
// for finding x!
for(j=n;j>0;j--)
{
k=k*j;
}
r=i/k;
if(n%4==0)
sum=sum+r;
else
sum=sum-r;
}
printf("The sum is %f",sum);
}