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

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?

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

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

Which of the following is safest for downcasting?

How to compare below 2 strings? let str1 = 'string1' let str2 = 'string2'

What are the features of Swift Programming?

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

Which of the following statements about Extensions is false?

Which one is correct function definition?