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home | helpCEIL(3) BSD Library Functions Manual CEIL(3) NAME ceil, ceilf, ceill, floor, floorf floorl -- ceiling and floor LIBRARY Math Library (libm, -lm) SYNOPSIS #include <math.h> double ceil(double x); float ceilf(float x); long double ceill(long double x); double floor(double x); float floorf(float x); long double floorl(long double x); DESCRIPTION The ceil(), ceilf(), and ceill() functions return the smallest integral value greater than or equal to x. Conversely, the floor(), floorf(), and floorl() functions return the largest integral value less than or equal to x. SEE ALSO abs(3), fabs(3), math(3), nextafter(3), rint(3) STANDARDS The described functions conform to ISO/IEC 9899:1999 ("ISO C99"). BSD November 12, 2013 BSD
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