Swift Lang中的无限性

对于整数值,您应该使用Int.max.

var highestNumber = Int.max

//if you need negative infinity
var lowestNumber = Int.min

使用NSIntegerMax代替Int.max或-1 * NSIntegerMax替代Int.min等效,但不太漂亮.(谢谢@Charlesism)

已经建立无限和检查功能.你也可以直接将它们与<.

var infinity = Double.infinity
var isInfinite = infinity.isInfinite
var someDouble = 234432.0
if someDouble < infinity {
    println("Less than")
} else {
    println("Small than")
}
// And the answer is Less than.