How to print decreasing odd numbers starting from scanf input integer in C?

Question

If you input even numbers, only the odd numbers will be printed until it reaches 0. (0 will not be printed). For example, if you input 10, the output would be 9, 7, 5, 3, 1.

This is what I came up with. I'm wondering what should I decrement x by to get the desired output.

int x;
scanf("%d", &x);
while (x >= 0) {
  printf("%d", x);
  x = x - 2;
}

Answer 1

I'm wondering what should I decrement x by to get the desired output.

Subtracting 2 is fine, as long as you always start from an odd number. So you could change the loop into something like this:

for ( int i = x % 2 ? x : x - 1; // Is x odd? good. 
                                 // Otherwise, start from the previous one.
      i > 0;
      i -= 2 ) {
    printf("%d\n", i);
}

Answer 2

int x, n;


printf("Give N: ");
scanf("%d", &n);

printf("odd numbers from 1 to %d are: \n", n);
x=n;
while(x<=n && x>0)
{
    if(x%2!=0)
    {
        printf("%d\n", x);
    }
    x--;
}

return 0;

}