JavaScript Data Type with Example

JavaScript DataTypes

Data types is basically used to specify what kind of data can be stored and manipulated within a program.

It means Data type indicates characteristics of data. It tells the compiler whether the data value is numeric, alphabetic, date etc., so that it can perform the appropriate operation.

There are following Data Type:

• Numbers
• Strings
• Boolean
• Null
• Undefined
• Object

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JS Number Data Type

JavaScript has only one Number (numeric) data types. Number data type can store normal integer, floating-point values.

The number data type is used to represent positive or negative numbers with or without decimal place

675,89.654

Example:

Try This

Result:

12
30.5
6250000
0.00000925

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JS String Data Type

String is a primitive data type in JavaScript. A string is textual content. It must be enclosed in single or double quotation marks.

Example:

Try This

Result:

   Demo: JavaScript String
   Welcome to aimtocode
   Keep Learning

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JS Boolean Data Type

JavaScript Boolean dat type returns values either in true or false, and it is use to perform logically operator to determine condition/expression is true

Example:

Try This

Result:

Demo: JavaScript Boolean
false
false
false
false
false
true
true

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JS Null Data Type

JavaScript Null specifies variable is declare but values of this variable is empty

Example:

Try This

Result:

null
Wel-come to aimtocode!
null 

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JS Undefined Data Type

This can only have one value-the special value undefined. If a variable has been declared, but has not been assigned a value, has the value undefined

Example:

Try This

Result:

undefined
Wel-Come to aimtocode! 

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JS Object Data Type

The object is a complex data type that allows us to store collections of data.

Undefined is also a primitive value in JavaScript. A variable or an object has an undefined value when no value is assigned before using it

JavaScript objects are written with curly braces {}.Object properties are written as name:value pairs, separated by commas.

Example:

Try This

Result:

JavaScript Objects
Rahul is 22 years old.

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