i have a question
please refer below..

Example:

#include <stdio.h>
int main() {
printf("%6.1f", 123456.123456);
printf("\n%6.2f ", 123456.123456);
printf("\n%6.3f ", 123456.123456);
printf("\n%6.4f ", 123456.123456);
}

output :
123456.1
123456.12
123456.123
123456.1235...