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JavaScript Data Structures

bookChallenge: Access Array Elements

Task

  1. Create an array called stars with the following star names:
    • "Sirius";
    • "Alpha Centauri";
    • "Betelgeuse";
    • "Polaris".
  2. Log individual star names using different indices (0, 1, 2, and 3) using console.log

              
123456

            
const stars = ___;

console.log("First element:", ___); // Output: Sirius
console.log("Second element:", ___); // Output: Alpha Centauri
console.log("Third element:", ___); // Output: Betelgeuse
console.log("Forth element:", ___); // Output: Polaris
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Expected output:

First element: Sirius
Second element: Alpha Centauri
Third element: Betelgeuse
Forth element: Polaris
  1. Use square brackets [] to create an array.
  2. Separate each element with the comma ,.
  3. Use console.log() to log the value of the array element at the specified index.

              
123456

            
const stars = ["Sirius", "Alpha Centauri", "Betelgeuse", "Polaris"];

console.log("First element:", stars[0]); // Output: Sirius
console.log("Second element:", stars[1]); // Output: Alpha Centauri
console.log("Third element:", stars[2]); // Output: Betelgeuse
console.log("Forth element:", stars[3]); // Output: Polaris
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Osio 4. Luku 2

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bookChallenge: Access Array Elements

Task

  1. Create an array called stars with the following star names:
    • "Sirius";
    • "Alpha Centauri";
    • "Betelgeuse";
    • "Polaris".
  2. Log individual star names using different indices (0, 1, 2, and 3) using console.log

              
123456

            
const stars = ___;

console.log("First element:", ___); // Output: Sirius
console.log("Second element:", ___); // Output: Alpha Centauri
console.log("Third element:", ___); // Output: Betelgeuse
console.log("Forth element:", ___); // Output: Polaris
copy

Expected output:

First element: Sirius
Second element: Alpha Centauri
Third element: Betelgeuse
Forth element: Polaris
  1. Use square brackets [] to create an array.
  2. Separate each element with the comma ,.
  3. Use console.log() to log the value of the array element at the specified index.

              
123456

            
const stars = ["Sirius", "Alpha Centauri", "Betelgeuse", "Polaris"];

console.log("First element:", stars[0]); // Output: Sirius
console.log("Second element:", stars[1]); // Output: Alpha Centauri
console.log("Third element:", stars[2]); // Output: Betelgeuse
console.log("Forth element:", stars[3]); // Output: Polaris
copy

Oliko kaikki selvää?

Miten voimme parantaa sitä?

Kiitos palautteestasi!

Osio 4. Luku 2
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