%6f limits the output to only six digits : float Display « Data Type « C Tutorial

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

}

123456.1
      123456.12
      123456.123
      123456.1235

2.20.float Display
	2.20.1.	Displaying Floating-Point Data Types with printf: %f
	2.20.2.	To create precision with floating-point numbers
	2.20.3.	%6f limits the output to only six digits
	2.20.4.	%e displays numbers in scientific format.
	2.20.5.	use the %E in printf() to display scientific-notation numbers
	2.20.6.	%g displays a floating-point number in either the %f or %e (scientific) format, depending on which is shorter.
	2.20.7.	Printing floating-point numbers with floating-point conversion specifiers