Swift program to get the inverse cosine value in radian

Program/Source Code:

The source code to get the inverse cosine value in radian is given below. The given program is compiled and executed successfully.

// Swift program to get the 
// inverse cosine value in radian

import Swift
import Foundation

var num:Double  = -0.09668180163468348
var res:Double  = 0

res = acos(num)

print("Result: ",res)

Output:

Result:  1.667629385640827

...Program finished with exit code 0
Press ENTER to exit console.

Explanation:

In the above program, we imported a package Swift to use the print() function using the below statement,

import Swift;

To use mathematics and some standard functions, we need to import the foundation package using the below statement,

import Foundation;

Here, we created two double type variables num, res initialized with "-0.09668180163468348", "0.0". Then we found the inverse cosine value in radian and printed the result on the console screen.