ceil(+2.4) = +3.0 ceil(-2.4) = -2.0 ceil(-0.0) = -0.0 ceil(-Inf) = -inf
This function (for double argument) behaves as if (except for the freedom to not raiseFE_INEXACT) implemented by
Trigonometric and hyperbolic functions
Errors are reported as specified inmath_errhandling.
Nearest integer floating point operations
7.22 Type-generic math tgmath.h (p: 335-337)
The largest representable floating-point values are exact integers in all standard floating-point formats, so this function never overflows on its own; however the result may overflow any integer type (includingintmax_t), when stored in an integer variable.
7.12.9.1 The ceil functions (p: 231-232)
7.25 Type-generic math tgmath.h (p: 373-375)
7.12.9.1 The ceil functions (p: 251)
If the implementation supports IEEE floating-point arithmetic (IEC 60559),
computes largest integer not greater than the given value
F.10.6.1 The ceil functions (p: 526)
C89/C90 standard (ISO/IEC 9899:1990):
F.9.6.1 The ceil functions (p: 462-463)
FE_INEXACTmay be (but isnt required to be) raised when rounding a non-integer finite value.
If no errors occur, the smallest integer value not less thanarg, that is⌈arg⌉, is returned.
Floating point manipulation functions
Computes the smallest integer value not less than
