#include <stdio.h>
int main()
{
    int i;
    for (i = 0; i <= 10; i++)
    {
        printf("%d\n", i);
        i++;
    }
}

codeaft@codeaft:~$ gcc codeaft.c
codeaft@codeaft:~$ ./a.out
0
2
4
6
8
10
codeaft@codeaft:~$ 

#include <stdio.h>
int main()
{
    int i;
    for (i = 1; i <= 10; i++)
    {
        printf("%d\n", i);
        i++;
    }
}

codeaft@codeaft:~$ gcc codeaft.c
codeaft@codeaft:~$ ./a.out
1
3
5
7
9
codeaft@codeaft:~$