I am trying to solve this on C, However i only get 1 as result. I dont know what i do wrong
1-\frac{x^2}{2!}+\frac{x^4}{4!}-\frac{x^6}{6!}...


#include <stdio.h>
#include <math.h>
#define epsilon 0.0001

int x,n,i;
double s, ar, pa, k, l;
int main()

{printf("x="); scanf("%d", &x);

s=1;
ar=1;
pa=1;
k=2;
l=1;

if(2<=n<=10);

{for (i=1;i<=n;i++)
{ ar=ar*(pow(x,2));
  pa=pa*(k-1)*k;
  k=k+2;
  l=-l;
  s=s+l*(ar/pa);}
  }

printf("sum=%f\n",s);

return 0;
}