JavaScript's primitive data types, including String, Number, Boolean, Undefined, Null, and Symbol, are the building blocks of coding in the language. They enable arithmetic operations, logical flow control, text manipulation, and represent simple data structures. Understanding these types, along with non-primitive types like Objects, Arrays, and Functions, is crucial for developers to create robust and dynamic web applications.
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Strings represent textual data within quotes and are used for manipulating text in JavaScript
Integer
Integers are whole numbers used for arithmetic operations in JavaScript
Floating-point
Floating-point numbers are used for decimal values in JavaScript
BigInt
BigInt is a data type for larger integers introduced in ECMAScript 2015
Booleans represent true or false values and are used for controlling program flow with logic in JavaScript
Undefined signifies an uninitialized variable in JavaScript
Null represents a deliberate absence of any object value in JavaScript
Symbols are unique and immutable data types often used as identifiers for object properties in JavaScript
Objects are mutable data types that can hold collections of values and come equipped with built-in methods in JavaScript
Arrays are mutable data types that can hold collections of values and come equipped with built-in methods in JavaScript
Functions are mutable data types that can hold collections of values and come equipped with built-in methods in JavaScript
Primitive data types are immutable, meaning they cannot be changed after creation, while non-primitive data types are mutable
Primitive data types are stored directly in the variable itself, while non-primitive data types are stored by reference to a memory location
Non-primitive data types have built-in methods for manipulating data, while primitive data types do not
Changes to non-primitive data types can affect all references to that data, while changes to primitive data types only affect the specific variable
Primitive data types have default values, while non-primitive data types do not
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String data type usage in JavaScript
Represents textual data, enclosed in quotes, used for storing and manipulating text.
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Difference between Undefined and Null in JavaScript
Undefined indicates an uninitialized variable; Null is a deliberate non-value to signify no object.
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Purpose of Symbol type in JavaScript
Provides unique, immutable identifiers for object properties, ensuring property uniqueness.
