Aprende Challenge: Modify Array Elements | Mastering JavaScript Arrays

Task

The task is to directly modify, check the length, and access specific elements within the array.

Create an array called cities with the following city names:
- "Shanghai";
- "Sydney";
- "Toronto";
- "Frankfurt".
Modify the city name at index 2 to "Miami" directly within the array.
Log the length of the cities array using console.log().
Retrieve and log the last city name in the array using console.log().


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// Task 1: Initial array
const cities = ___;

// Task 2: Modify a city name
cities___ = "Miami";

// Modified array
console.log(cities); // Output: Shanghai, Sydney, Miami, Frankfurt

// Task 3: Log array length
console.log("Array length:", ___); // Output: Array length: 4

// Task 4: Access and log the last city
console.log("Last city:", ___); // Output: Last city: Frankfurt

Expected Output:

Shanghai,Sydney,Miami,Frankfurt
Array length: 4
Last city: Frankfurt

Use square brackets [] to create an array.
Separate each element with the comma ,.
Use console.log() to log the data.
Use square brackets [] within the element index to access the element and change its value.
Use the keyword length to get the array length.


              1234567891011121314
            
// Task 1: Initial array
const cities = ["Shanghai", "Sydney", "Toronto", "Frankfurt"];

// Task 2: Modify a city name
cities[2] = "Miami";

// Modified array
console.log(cities); // Output: Shanghai, Sydney, Miami, Frankfurt

// Task 3: Log array length
console.log("Array length:", cities.length); // Output: Array length: 4

// Task 4: Access and log the last city
console.log("Last city:", cities[cities.length - 1]); // Output: Last city: Frankfurt

¿Todo estuvo claro?

¡Gracias por tus comentarios!

Sección 4. Capítulo 4

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Task

The task is to directly modify, check the length, and access specific elements within the array.

Create an array called cities with the following city names:
- "Shanghai";
- "Sydney";
- "Toronto";
- "Frankfurt".
Modify the city name at index 2 to "Miami" directly within the array.
Log the length of the cities array using console.log().
Retrieve and log the last city name in the array using console.log().


              123456789101112131415
            
// Task 1: Initial array
const cities = ___;

// Task 2: Modify a city name
cities___ = "Miami";

// Modified array
console.log(cities); // Output: Shanghai, Sydney, Miami, Frankfurt

// Task 3: Log array length
console.log("Array length:", ___); // Output: Array length: 4

// Task 4: Access and log the last city
console.log("Last city:", ___); // Output: Last city: Frankfurt

Expected Output:

Shanghai,Sydney,Miami,Frankfurt
Array length: 4
Last city: Frankfurt

Use square brackets [] to create an array.
Separate each element with the comma ,.
Use console.log() to log the data.
Use square brackets [] within the element index to access the element and change its value.
Use the keyword length to get the array length.


              1234567891011121314
            
// Task 1: Initial array
const cities = ["Shanghai", "Sydney", "Toronto", "Frankfurt"];

// Task 2: Modify a city name
cities[2] = "Miami";

// Modified array
console.log(cities); // Output: Shanghai, Sydney, Miami, Frankfurt

// Task 3: Log array length
console.log("Array length:", cities.length); // Output: Array length: 4

// Task 4: Access and log the last city
console.log("Last city:", cities[cities.length - 1]); // Output: Last city: Frankfurt

¿Todo estuvo claro?

¡Gracias por tus comentarios!

Sección 4. Capítulo 4

Challenge: Modify Array Elements

Task

Expected Output:

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Challenge: Modify Array Elements

Task

Expected Output: