Data Types in JavaScript
メニューを表示するにはスワイプしてください
JavaScript works with different types of data. The most common ones are strings, numbers, and booleans.
A string is text:
const name = "John";
A number is a numeric value:
const age = 25;
A boolean represents a true or false value:
const isLoggedIn = true;
There are also two special values: null and undefined.
undefined means a variable has been declared but has no value:
let value;
console.log(value); // undefined
null is an intentional absence of value:
const data = null;
Understanding these types is important because JavaScript behaves differently depending on the type of data you are working with.
フィードバックありがとうございます！
AIに質問する
AIに質問する
何でも質問するか、提案された質問の1つを試してチャットを始めてください
Data Types in JavaScript
JavaScript works with different types of data. The most common ones are strings, numbers, and booleans.
A string is text:
const name = "John";
A number is a numeric value:
const age = 25;
A boolean represents a true or false value:
const isLoggedIn = true;
There are also two special values: null and undefined.
undefined means a variable has been declared but has no value:
let value;
console.log(value); // undefined
null is an intentional absence of value:
const data = null;
Understanding these types is important because JavaScript behaves differently depending on the type of data you are working with.
フィードバックありがとうございます！
