For Loop in C

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>



int main() 
{
    int a, b;
    scanf("%d\n%d", &a, &b);
       for (int i = a; i <= b; i ++)
       {
        if(i >= 1 && i <= 9) {
            if(i == 1) {
                printf("one\n");
            } else if(i == 2) {
                printf("two\n");
            } else if(i == 3) {
                printf("three\n");
            } else if(i == 4) {
                printf("four\n");
            } else if(i == 5) {
                printf("five\n");
            } else if(i == 6) {
                printf("six\n");
            } else if(i == 7) {
                printf("seven\n");
            } else if(i == 8) {
                printf("eight\n");
            } else if(i == 9) {
                printf("nine\n");
            }
        } 
        else
        {
            if(i % 2 == 0)
            {
                printf("even\n");
            } else
            {
                printf("odd\n");
            }
            
        }
    }

    return 0;
}