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floor

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< c‎ | numeric‎ | math
Revision as of 16:28, 1 July 2013 by P12bot (Talk | contribs)

 
 
 
Common mathematical functions
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Trigonometric and hyperbolic functions
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Nearest integer floating point operations
floor
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Macro constants
 
Defined in header <math.h>
float       floorf( float arg );
(since C99)
double      floor( double arg );
long double floorl( long double arg );
(since C99)

Computes nearest integer not greater than arg.

Contents

Parameters

arg - floating point value

Return value

Nearest integer not greater than arg

Notes

The integer value can be always represented by the given floating point type.

Example

#include <stdio.h>
#include <math.h>
 
void report_floorf(float f) {
	printf("floorf(%5.2f)=%5.2f\n",f,floorf(f));
} /* end report_floorf() */
 
void demo_floorf() {
	report_floorf(9.1f);
	report_floorf(-9.1f);
	report_floorf(0.0f);
} /* end demo_floorf() */

Output:

floorf( 9.10)= 9.00
floorf(-9.10)=-10.00
floorf( 0.00)= 0.00

See also

nearest integer not less than the given value
(function) [edit]
(C99)
nearest integer not greater in magnitude than the given value
(function) [edit]
(C99)(C99)(C99)
nearest integer, rounding away from zero in halfway cases
(function) [edit]