ceil ceilf ceill

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

ceil ceilf ceill

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