Return x rounded toward zero to an integral value.

Synopsis

Declared in <bdldfp_decimalimputil.h>

Description

Special value handling: * if x is quiet NaN, quiet NaN is returned. * If x is signaling NaN, quiet NaN is returned and the value of the macro EDOM is stored into errno. * if x is +/‐infinity or +/‐0, it is returned unmodified.

Examples: trunc(0.5) ==> 0.0; trunc(‐0.5) ==> 0.0

Return Value

x rounded toward zero to an integral value

Parameters

Name

Description

x

value to truncate

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