FloatingPointRoundingRule.down
Round to the closest allowed value that is less than or equal to the source.
Declaration
case downDiscussion
The following example shows the results of rounding numbers using this rule:
(5.2).rounded(.down)
// 5.0
(5.5).rounded(.down)
// 5.0
(-5.2).rounded(.down)
// -6.0
(-5.5).rounded(.down)
// -6.0This rule is equivalent to the C floor function and implements the roundToIntegralTowardNegative operation defined by the IEEE 754 specification.