Lab "population' Why is it when i put 18 as an end population, the loop for 'start date' is initiated again after there being a condition of (e < s)?

Question

#include <cs50.h>
#include <stdio.h>

int main(void)
{
    int counter = 0;
    int apop;
    int e;
    // TODO: Prompt for start size
    do
    {
        int s;
        do
        {
            s = get_int("Start pop: ");
        }
        while (s < 9);
    
    // TODO: Prompt for end size
        do
        {
            e = get_int("End pop: ");
        }
        while (e < s);
    
    // TODO: Calculate number of years until we reach threshold
        apop = s + (s / 3 - s / 4);
        counter++;
    }
    while (apop < e);
    
    // TODO: Print number of years
    printf("Years = %i\n", counter);
}

Answer 1

The loops that ask for the initial and final numbers are nested inside another DO-WHILE loop, whose end-of-cycle condition is:

while (apop < e);

as long as this condition is not satisfied, the innermost conditions will continue to run.