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Conditional Statements and Loops in JavaScript

bookswitch Statements

Imagine you are standing in front of a vending machine filled with snacks. Each snack has a number below it. You simply press the number of the snack you want, and the machine gives it to you. This is a lot like how a switch statement works in JavaScript. You have a single value (like the number you press), and the code chooses the right action based on that value. Instead of checking every possibility with a long chain of if...else if statements, you can use a switch to make your code clearer and easier to read.


              
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// Choose a snack based on the selected number
let snackNumber = 2;
let snack;

switch (snackNumber) {
  case 1:
    snack = "Chips";
    break;
  case 2:
    snack = "Chocolate Bar";
    break;
  case 3:
    snack = "Granola Bar";
    break;
  default:
    snack = "Unknown snack";
}

console.log("You chose: " + snack);
copy

1. When is a switch statement more useful than multiple if...else if statements?

2. Complete the switch statement so that it sets 'snack' to 'Granola Bar' when 'snackNumber' is 3.

question mark

When is a switch statement more useful than multiple if...else if statements?

Select the correct answer

question-icon

Complete the switch statement so that it sets 'snack' to 'Granola Bar' when 'snackNumber' is 3.

You chose: Granola Bar

Click or drag`n`drop items and fill in the blanks

Alt var klart?

Hvordan kan vi forbedre det?

Takk for tilbakemeldingene dine!

Seksjon 1. Kapittel 5

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Suggested prompts:

Can you explain how the `switch` statement works in this example?

What happens if I change the value of `snackNumber`?

Are there any advantages of using `switch` over `if...else` statements?

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bookswitch Statements

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Imagine you are standing in front of a vending machine filled with snacks. Each snack has a number below it. You simply press the number of the snack you want, and the machine gives it to you. This is a lot like how a switch statement works in JavaScript. You have a single value (like the number you press), and the code chooses the right action based on that value. Instead of checking every possibility with a long chain of if...else if statements, you can use a switch to make your code clearer and easier to read.


              
12345678910111213141516171819

            
// Choose a snack based on the selected number
let snackNumber = 2;
let snack;

switch (snackNumber) {
  case 1:
    snack = "Chips";
    break;
  case 2:
    snack = "Chocolate Bar";
    break;
  case 3:
    snack = "Granola Bar";
    break;
  default:
    snack = "Unknown snack";
}

console.log("You chose: " + snack);
copy

1. When is a switch statement more useful than multiple if...else if statements?

2. Complete the switch statement so that it sets 'snack' to 'Granola Bar' when 'snackNumber' is 3.

question mark

When is a switch statement more useful than multiple if...else if statements?

Select the correct answer

question-icon

Complete the switch statement so that it sets 'snack' to 'Granola Bar' when 'snackNumber' is 3.

You chose: Granola Bar

Click or drag`n`drop items and fill in the blanks

Alt var klart?

Hvordan kan vi forbedre det?

Takk for tilbakemeldingene dine!

Seksjon 1. Kapittel 5
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