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Basic data types in javascript how to#

Represents integers with arbitrary precision.

Let d = Symbol("description") // d is a unique symbol Represents a unique identifier, used primarily for object properties. Represents a sequence of characters, enclosed in quotes. Represents a numeric value, either integer or floating point. Represents a boolean value, which can be true or false There are 7 primitive data types in JavaScript:įollowing is the table for all the primitive data types in javascript with their descriptions and examples. They are only used to store items of their type. These Javascript data types cannot be destructured further, nor do they have any pre-defined properties or methods. Primitive data types in javascript refer to those data types that are defined on the most basic level of the language. There are mainly two types of data types in JavaScript: It associates the declared variable (or item) with a particular type so that the compiler can perform operations in an organized manner. What are Data Types in JavaScript?ĭata types in JavaScript refer to the attribute associated with the kind of data we are storing or working on. Similarly, in JavaScript, we classify the data into multiple types in order to function more smoothly and precisely. Assigning a specific type to the data helps us in operating it smoothly. This data type acts as an identity for the element. The price or amount of grocery items is numbers whereas the names are texts or strings. An important attribute of these data elements is that it has a particular type. Be it the price of groceries or writing our names on documents, all of these involve data.

Basic data types in javascript how to#

Understanding how to identify and work with different types of data is a fundamental aspect of programming and will serve you as a foundation for more advanced concepts and techniques.Every day we encounter data in our usual chores.

typeof returns "object" for both objects and arrays, use Array.isArray() method to correctly identify arrays.

The typeof operator can be used to identify the type of a value.

JavaScript also has non-primitive data types, also known as object types, which include: object, array, function, date, and regular expressions.

JavaScript has seven primitive data types: number, string, boolean, symbol, bigint, undefined and null.

For example: let isStudent = true let isHappy = false if ( isStudent ) ) ) // false Conclusion They are often used in conditional statements. For example: let name = "John" let message = 'Hello, World!' Booleanīoolean values can only be true or false.

Strings can be written using single or double quotes. For example: let age = 30 let pi = 3.14 let largeNum = 1e+12 StringĪ sequence of characters.

They can also be written in scientific notation. Numbers can be integers or floating-point numbers. JavaScript has seven primitive data types: Number In this article, we'll take a look at the different data types in JavaScript, and how to use the typeof operator to identify them. Understanding data types is essential for writing efficient and effective code. JavaScript, like many other programming languages, uses data types to define the kind of values that a variable can hold.