The battery icon has 5 cells and bars of them are full. The loop goes over the 5 cells: show # for a full one and . for an empty one, all on one line. With bars at 3 it shows [###..].
[###..]
#include <stdio.h>
int main(void) {
int bars = 3;
printf("[");
for (int i = 0; i < 5; i++) {
// your code here: the first bars cells show #, the rest show .
}
printf("]\n");
return 0;
}
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