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Primitive Data Types in JavaScript

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Questions and Answers

Which of the following correctly describes the Boolean data type?

It indicates a variable that has not been assigned a value.

It is used for making decisions with two possible values. (correct)

It allows for an infinite number of combinations.

It can hold multiple values including strings and numbers.

What distinguishes the BigInt data type from the standard number type?

BigInt is used exclusively for text data.

BigInt can have a range that is always smaller than standard numbers.

BigInt allows for larger numerical values. (correct)

BigInt can only represent decimal numbers.

How must strings be formatted in JavaScript?

Strings must be enclosed in quotes. (correct)

Strings can be written without any enclosing symbols.

Strings must be surrounded by braces.

Strings require an integer prefix.

What does null represent in JavaScript?

<p>It signifies that a value is missing or absent. (C)</p> Signup and view all the answers

Which of the following statements about the symbol data type is true?

<p>Symbols act as unique identifiers to avoid label conflicts. (B)</p> Signup and view all the answers

Flashcards

JavaScript Primitive Types

Seven basic data types in JavaScript: string, number, Boolean, null, undefined, BigInt, and symbol.

String Data Type

Used to represent text; enclosed in quotes.

Number Data Type

Represents numerical values.

Boolean Data Type

Represents truth values: true or false.

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Null vs. Undefined

Null represents the intentional absence of a value; undefined means a variable has no assigned value.

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Study Notes

Primitive Data Types in JavaScript

JavaScript has seven primitive data types: string, number, Boolean, null, undefined, BigInt, and symbol.
Strings represent text, while numbers represent numerical values.
Strings must be enclosed in quotes. Numbers are written as plain numerical values.
Strings have a theoretically infinite length, while numbers have a limited range.

Boolean

Boolean values can be either true or false.
These are used in conditional statements to control program flow.

Null and Undefined

null represents the intentional absence of a value.
undefined designates a variable that has not been assigned a value.

BigInt

BigInt handles values larger than the standard number type can represent.

Symbol

Symbol values are unique and prevent naming conflicts.

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Description

This quiz covers the seven primitive data types in JavaScript, including string, number, Boolean, null, undefined, BigInt, and symbol. Each type's characteristics and usage will be explored to enhance your understanding of data handling in JavaScript. Test your knowledge on these fundamental concepts!