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JavaScript Essentials for Backend

Working with Arrays

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Arrays are used to store multiple values in a single variable.

const numbers = [1, 2, 3];

Each value in an array has a position called an index. Indexes start from 0.


              
123

            
const numbers = [1, 2, 3];

console.log(numbers[0])

Arrays often store collections of similar data, but they can also store objects.

const users = [
  { name: "John", age: 25 },
  { name: "Jess", age: 30 }
];

You can access elements by index and work with their data:


              
123456

            
const users = [
  { name: "John", age: 25 },
  { name: "Jess", age: 30 }
];

console.log(users[0].age);
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What will this code output?

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War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 7

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Working with Arrays

Arrays are used to store multiple values in a single variable.

const numbers = [1, 2, 3];

Each value in an array has a position called an index. Indexes start from 0.


              
123

            
const numbers = [1, 2, 3];

console.log(numbers[0])

Arrays often store collections of similar data, but they can also store objects.

const users = [
  { name: "John", age: 25 },
  { name: "Jess", age: 30 }
];

You can access elements by index and work with their data:


              
123456

            
const users = [
  { name: "John", age: 25 },
  { name: "Jess", age: 30 }
];

console.log(users[0].age);
War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 7
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