In JavaScript, switch cases can be used to make decisions depending on the input. To set up a switch case, use the switch statement with an expression that evaluates to a value. Each case statement block provides the value to be compared with the switch statement's expression. The break statement is used to break out of the switch block after a case statement is matched. Here is an example in JavaScript:

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switch (num) {
  case 1:
    console.log('Number is 1');
    // program break
    break;  
  case 2:
    console.log('Number is 2');
    // program break
    break;    
  case 3:
    console.log('Number is 3');
    // program break
    break;
  default:
    console.log('Number is not 1, 2, nor 3');
}

For more information on switch cases, see this Mozilla Docs article.

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let result = `The result of adding ${x + y} is ${x + y}.`

This statement uses string interpolation to create a string using variables x and y.

The arguments in a function are the input values that the function receives when called. The function uses these values as parameters and performs some operation or calculation based on them, then returns a result. These parameters can be of any type, including primitive data types such as numbers and strings, complex data types like objects and arrays, or other functions. For example, in the following function the argument (or parameter) is x:

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function addNumber(x){
    return x + 10;
}

When the addNumber function is called with a value of 5, the function returns 15 since x is equal to 5.

To prompt a question with JavaScript, you can use the prompt() method. prompt() opens a dialog box that prompts the user for input. For example, to prompt the user for their name, you can use the following code:

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var name = prompt("What is your name?");

This code opens a dialog box with the question "What is your name?" and stores the response in a name variable. For more information, please refer to the MDN docs.

Creating a new button depends on the programming language and framework you are using.

For example, in HTML and CSS you can add a button to your web page with the following code:

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<button type="button">Click Me!</button>

Additionally, you can use <input type="button" /> to add a button.

You can also use JavaScript or any other programming language to create a button. A general guide for JavaScript can be found here.

The following JavaScript code will alert the value of the password input when a form is submitted:

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document.querySelector('form').onsubmit = () => {
  alert(document.querySelector('input[type="password"]').value);
}

More information about forms can be found in this MDN article.

In JavaScript, you can declare an object by asking for input from the user with a prompt, and assigning it to a variable.

Here's an example:

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let userObject = {};
let userInput = prompt("Please enter some data");
userObject.data = userInput;

This will store the user's input in the userObject variable.

To declare value with a prompt in JavaScript, you'll need to use the prompt() method. This method takes in a string of text which will be used as the prompt to request input from the user.

Example code:

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let age = prompt("What is your age?");
console.log("You are "+age+" years old.");

Learn more about prompt() here.

You can create a prompt question with different spelling answers in most modern coding languages. A common example using JavaScript would be using the prompt() function to ask the user a question, followed by the if...else command to determine whether their response is spelled correctly. For example:

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let answer = prompt('What do you call a group of lions?');

if (answer === 'pride') {
  alert('You got it right!');
} else {
  alert('The correct spelling is "pride"');
}

That way, if the user spells the answer incorrectly, the if...else statement will alert them.

More information on prompt() and if...else statements can be found here:

• prompt()
• if...else

The code is written in JavaScript and makes use of DOM-related functions, such as document.querySelector to access and manipulate elements of the DOM.

The search() function is being triggered when the user submits the form, indicated by the event listener form.addEventListener set to submit. The purpose of the function is to take the value from the input with the id="city-input" and store it. The event.preventDefault() is then used to actually prevent the form from submitting, since we want to manage the input with JavaScript logic first.

When the value is stored, a conditional is used to check whether the input is empty or not. If it is empty, an alert of the value will be triggered. Otherwise, the innerHTML of h5 is changed to the value of the input.

This is how the code works overall.

For more information on how events work in JavaScript, you can refer to this link.