Swift - acos() Function
The Swift acos() function returns arc cosine of a value. The returned value will be in the range 0 through 𝜋.
Syntax
In Foundation framework, it is defined as follows:
public func acos(_ x: CGFloat) -> CGFloat public func acos(_ x: Float) -> Float public func acos(_ x: Float80) -> Float80 public func acos(_ __x: Double) -> Double
Parameters
x |
Specify the value in range [-1.0, 1.0]. |
Return Value
Returns the arc cosine of the value.
If the x is not in the range of [-1.0, 1.0], it returns nan.
Example:
In the example below, acos() function is used to is used to find out the arc cosine of a given value.
import Foundation
print("acos(0.0) = \(acos(0.0))")
print("acos(0.5) = \(acos(0.5))")
print("acos(1.0) = \(acos(1.0))")
print("acos(2.0) = \(acos(2.0))")
The output of the above code will be:
acos(0.0) = 1.5707963267948966 acos(0.5) = 1.0471975511965979 acos(1.0) = 0.0 acos(2.0) = nan
❮ Swift Math Functions
