Which one is correct function definition?

Which of the following statements about Extensions is false?

What is the output of this segment of code? var x = 0 for index in 1...5 { ++x } println('\(x)')

Which of the following could be used to indicate the Function Type of the following function: func joinStrings(stringOne: String, stringTwo: String) -> String { return stringOne + stringTwo }

What are the features of Swift Programming?

What will be the output of the following code snippet? var ary1 = [1, 2, 3, 4]; var ary2 = ary1; ary2.append(5); var result = ary1.count;

Which of the following is safest for downcasting?

What can be execution problem? import UIKit func MinMax(array: [Int]) -> (min: Int, max: Int) { var min = array[0]; var max = array[0];

Output of code snippet? let val1 = 'Hello,' let val2 = 'World' var result = val1 \ val2 print( result )

A while loop performs a set of statements until a condition becomes false. These kinds of loops are best used when the number of iterations is not known before the first iteration begins. Swift provides two kinds of while loops?

Closure expressions in Swift language follow crisp, optimization, and lightweight syntax styles which includes?