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Showing content from https://cplusplus.com/reference/cfenv/FE_DOWNWARD/ below:

macro

<cfenv>

FE_DOWNWARD

Downward rounding direction mode

This macro expands to a value of type int that identifies the downward rounding direction mode for functions fegetround and fesetround.

Rounding x downward selects the largest possible value that is not greater than x.

Possible rounding direction modes are:



See also
FE_TONEAREST
To-nearest rounding direction mode (macro)
FE_TOWARDZERO
Toward-zero rounding direction mode (macro)
FE_UPWARD
Upward rounding direction mode (macro)
fegetround
Get rounding direction mode (function)
fesetround
Set rounding direction mode (function)

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