Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Apprendre Variables | Section
JavaScript Essentials for React Native Development

Variables

Glissez pour afficher le menu

Variables are used to store data in your program.

Instead of repeating values everywhere, you save them in a variable and reuse them when needed.

In JavaScript, you will mostly use two keywords:

  • const: for values that should not change;
  • let: for values that can change.

Example:


              
1234567

            
const name = "Alex";
let count = 0;

count = count + 1;

console.log(name);
console.log(count);

Here, name stays the same, while count can be updated.

Using the right type of variable helps you write clearer and more predictable code.

question mark

Which keyword should you use for a value that will change?

Sélectionnez la réponse correcte

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 1. Chapitre 2

Demandez à l'IA

expand

Demandez à l'IA

ChatGPT

Posez n'importe quelle question ou essayez l'une des questions suggérées pour commencer notre discussion

Variables

Variables are used to store data in your program.

Instead of repeating values everywhere, you save them in a variable and reuse them when needed.

In JavaScript, you will mostly use two keywords:

  • const: for values that should not change;
  • let: for values that can change.

Example:


              
1234567

            
const name = "Alex";
let count = 0;

count = count + 1;

console.log(name);
console.log(count);

Here, name stays the same, while count can be updated.

Using the right type of variable helps you write clearer and more predictable code.

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 1. Chapitre 2
some-alt