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CEIL(3)
CEIL(3) FreeBSD Library Functions Manual CEIL(3)

NAME

ceil, ceilf, ceillsmallest integral value greater than or equal to x

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include < math.h>

double
ceil( double x);

float
ceilf( float x);

long double
ceill( long double x);

DESCRIPTION

The ceil(), ceilf() and ceill() functions return the smallest integral value greater than or equal to x, expressed as a floating-point number.

STANDARDS

The ceil() function conforms to ISO/IEC 9899:1990 (“ISO C90”). The ceilf() and ceill() functions conform to ISO/IEC 9899:1999 (“ISO C99”).
January 13, 2005 FreeBSD