Fibonacci Series

#include<stdio.h>

main()
{
    int k,r;
    int i=1,j=1,f;

    printf("Enter the number range :  ");
    scanf("%d",&r);

    printf("fibonacci series :\n");
    printf("%d\n%d\n",i,j);

    for(k=2;k<r;k++)
 {
         f=i+j;
         i=j;
         j=f;
         printf("%d\n",j);
    }
}