Instance Method


Returns the square root of the value, rounded to a representable value.


func squareRoot() -> CGFloat

Return Value

The square root of the value.


The following example declares a function that calculates the length of the hypotenuse of a right triangle given its two perpendicular sides.

func hypotenuse(_ a: Double, _ b: Double) -> Double {
    return (a * a + b * b).squareRoot()

let (dx, dy) = (3.0, 4.0)
let distance = hypotenuse(dx, dy)
// distance == 5.0