Question: Given the following: let defaultAudioLevel = 0 . 5 var userSetAudioLevel: Double? var audioLevel = userSetAudioLevel ? ? defaultAudioLevel Which of the following is used

Given the following:
let defaultAudioLevel =0.5
var userSetAudioLevel: Double?
var audioLevel = userSetAudioLevel ?? defaultAudioLevel
Which of the following is used in the Swift code?
Nil-Coalescing Operator
Optional Chaining
Range Operator
Subscripts
Given the following: let defaultAudioLevel = 0 .

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Programming Questions!

Q:

no exaplanations needed no explanations needed(just give me direct answers ) Question 2 6.67 pts Given the following: let defaultAudioLevel = 0.5 var userSetAudioLevel: Double? var audioLevel =...

Q:

undefined Question 5 5 pts Given the following in Swift: struct Kilometers { var kilometers: Double init(from Miles miles: Double) { kilometers = miles * 1.60934 } init(from Meters meters: Double) {...

Q:

Question 1 Enumerations in Swift can define computed properties. True False Question 2 Raw values are the same as associated values. True False Question 3 Which of the following allows you to store...

Q:

I need a little help with a few Swift questions. I will give thumbs up, Thank You. Which of the following is not a valid way to declare a Boolean type? var visible=true var visible: Bool = true var...

Q:

Can someone please help answer some swift programming questions? Question 21 Which of the following declares a variable that is an implicitly unwrapped optional Double? var income: Double var income:...

Q:

please help with these swift questions I will thumbs up in rating !!! 1. what is an IBOutlet A) It is a variable in a view controller that references a user interface element in Interface Builder....

Q:

From my previous sourcecode: The source code: import UIKit / / Enum for BMI categories enum BMIStatus { case underweight case normal case overweight } / / BMI Calculator class class BMICalculator {...

Q:

Answer letters a-c given the following: Let h be a function satisfying the following statements. ~ dom h = R \\{-1, 1} ~ lim h(x) = +oo lim h(x) = -00 x-+1 x-1- lim h(x) = 1 lim h(x) = +oo x--1 X-+...

Q:

Given the following: Let x and ybe positive integers when completing part A. A. Explain why it is incorrect to claim that X vy is always irrational. Given: 0

Q:

Given the following: Let xand ybe positive integers when completing part A. A. Explain why it is incorrect to claim that X Vy is always irrational. Given: 0

Q:

Suppose that in a long bit string the frequency of occurrence of a 0 bit is 0.9 and the frequency of a 1 bit is 0.1 and bits occur independently. a) Construct a Huffman code for the four blocks of...

Q:

How is a special journal different from a general journal?

Q:

qb time is included in which version of qbo payroll? select all that apply: a ) payroll core b ) payroll premium c ) payroll elite d ) payroll enhanced

Q:

Construct a 90 confidence interval for the sample mean based on the following data x 14 90 and 3 8 O 144 068 145 932 O 144 215 145 785 O 144 341 145 659 O 144 599 145 401