NAME
ceil, ceilf, ceill – smallest 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.
SEE ALSO
abs(3), fabs(3), floor(3), ieee(3), math(3), rint(3), round(3), trunc(3)
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”).