Question: In Javascript, how do you check if the user's input is one of the elements in an array? I want to print an error message

In Javascript, how do you check if the user's input is one of the elements in an array? I want to print an error message if it is not.

e.g.

var numbers = [1, 2, 3, 4]

var choice = parseint(prompt("Enter a number between 1-4")

// if the choice is not in numbers, I want to print an error message

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 Databases Questions!

Q:

I'm posting this again because I still can't find a viable answer. This is my code I got a 10 out of 17. # function to check commas def checkCommas(dataPoint): # to check if there is comma or not if...

Q:

Hello, For "Data visualization(Pyhton3 ), I am getting the following errors:(please see screenshot). My code: # function to check commas def checkCommas(dataPoint): # to check if there is comma or...

Q:

1. Use the list() casting function, and the function range() to create the array for the dice options, instead of using diceOptions = [1, 2, 3, 4, 5, 6] 2. Use a for loop, with the in keyword a new...

Q:

Lab105 Lab105 Assignment Page 1 of Due Date: Friday,02/24@11:59pm Tuesday 02/28@11:59pm Points: 100 This is an individual assignment. Restrictions: You cannot import any Java classes except those...

Q:

Lab8 Access Array Exercise Warmup Exercises A number of practice questions to help you prepare for doing this lab are provided in the file Lab7_warmup_exercises.pdf Due Date and Demonstration This...

Q:

Assignment 6 Part 3 1 Introduction For this assignment, we are going to write a program that allows the user to enter, display & modify student records & save them to a structure array. The main...

Q:

Need help on this MIPS assignment about subroutines. I'm stuck on how to allocate memory and check sums. Any one could help me out I would appreciate. Lab Objective In this lab, you will learn how to...

Q:

Need help on this MIPS assignment about subroutines. I'm stuck on how to allocate memory and checksums. Anyone could help me out I would appreciate. Lab Objective In this lab, you will learn how to...

Q:

Need help coding this. Project Description This first project is meant to ensure that you are able to apply and extend your prerequisite knowledge as well as introduce you to developing and testing a...

Q:

Restrictions: You cannot import any Java classes except those listed below. In particular you cannot use any methods from the Java Array(s) class to copy an array, check for equality, or otherwise...

Q:

Find the solution you yolin coscxtall +b

Q:

(a) (b) (b) (c) (d) You work for Cao Chemical International, and your company regularly uses platinum as a catalyst for chemical reactions. To hedge your exposure to the price of platinum, you...

Q:

In the United States, a pharmaceutical company's exclusive patent rights last for Question 9 options: 2 0 years. 2 5 years. 1 0 years. 7 0 years.

Q:

what is the 3 - year strategic plan for AC Camera and UAV dron equipment using the table given what is the 3 - year strategic plan for AC Camera and UAV dron equipment

Q:

A challenge of case study based research is: a Findings cannot be generalised. b Individuals do not get their own voice. c It is suitable only for very large organisations. d It requires both...

Q:

Cross-cultural studies make use of: a A case study research strategy. b A comparative research strategy. c An appreciative inquiry approach. d A longitudinal research strategy.

Q:

Positivist researchers believe a Research should be value-free, utilise a scientific method, and based on empirical observations. b Unexpected events and contextual differences prevent researchers...