Return the common (base‐10) logarithm of the specified x.

Synopsis

Declared in <bdldfp_decimalutil.h>

static
Decimal32
log10(Decimal32 x);

Description

Special value handling: * If x is +/‐0, ‐infinity is returned and the value of the macro ERANGE is stored into errno. * If x is 1, +0 is returned. * If x is negative, quiet NaN is returned and the value of the macro EDOM is stored into errno. * If x is +infinity, +infinity is returned. * If x is quiet NaN, quiet NaN is returned. * If x is signaling NaN, NaN is returned and the value of the macro EDOM is stored into errno.

Return Value

common (base‐10) logarithm of x

Parameters

Name

Description

x

value whose base‐10 logarithm is returned

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