Float data type issue

Float data type outputs the data with 6 decimal points(like 5.00000) even the number doesn't have any decimal points.Why is that so?Can it just output the necessary decimals?

Code:

#include<stdio.h>
#include<conio.h>
#include<math.h>

main()

{
	
	
	float a,b,c,x;
	printf("Use this to work out the length of the hypotenuse on a right angled triangle.\n");
	printf("Please enter a:");
	scanf("%f",&a);
	printf("\nPlease enter b:");
	scanf("%f",&b);
	
	// a*a+b*b=c*c;
	
	x=a*a+b*b;
	c=sqrt(x);
	
	printf("\nThe triangle's hypotenuse has a length of %f ",c);
	
	getch();
	
	return 0;
}

Use %g instead of %f.

That's cool.Thanks,tabstop