Swift program to create a closure function and return a value

Program/Source Code:

The source code to create a closure function and return a value is given below. The given program is compiled and executed successfully.

// Swift program to create a 
// closure function and return a value

import Swift

// Define a closure
let AddNum = {
    (num1:Int, num2:Int) -> Int in
    return (num1 + num2)
}

// call the created closure
var sum = 0

sum = AddNum(10,20)

print("Sum is: ",sum)

Output:

Sum is:  30

...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

Here, we created a closure function AddNum() to with two integer parameters num1, num2 and return the addition of both numbers at the place of closure call.

And, we created an integer variable sum initialized with 0. Then call closure function AddNum() and printed the result on the console screen.