Contents

nextDown

The greatest representable value that compares less than this value.

Declaration

var nextDown: Self { get }

Discussion

For any finite value x, x.nextDown is less than x. For nan or -infinity, x.nextDown is x itself. The following special cases also apply:

  • If x is infinity, then x.nextDown is greatestFiniteMagnitude.

  • If x is leastNonzeroMagnitude, then x.nextDown is 0.0.

  • If x is zero, then x.nextDown is -leastNonzeroMagnitude.

  • If x is -greatestFiniteMagnitude, then x.nextDown is -infinity.