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What are the data types in Elm?

Amengor-Kwapong Angela

In programming, data types refer to the different kinds of values supported by a particular programming language.

Like other programming languages, Elm also has a defined set of data types.

Numeric data types in Elm

The numeric data type represents numeric values in Elm.

Numeric data types in Elm

Type

Function

Example

Number

Stores numbers

5

Float

Stores fractional values

The result of 5/2 i.e., 2.5

Integer

Stores non-fractional values

The result of 5//2 i.e., 2

String and Char data types in Elm

The String data type in Elm represents a sequence of characters. They are defined within double quotes ".

Meanwhile, the Char data type represents a single character. They are enclosed within single quotes '.

Example

Let’s consider the word educative. We can represent the whole word containing nine characters with the String data type. Meanwhile, we can singly represent each of those nine characters with the Char data type.

String and Char data types in Elm

Type

Function

example

String

Stores multiple characters

"educative"

Char

Stores single characters

'e'




Bool data type in Elm

The Bool data type in Elm supports the use of the values True and False. Boolean values are represented by the keyword Bool.

Bool data type in Elm

Type

Function

Example

Bool

Stores the values True or False

1 == 2 returns False

Structured data types

The Structured data type in Elm represents multiple or a collection of values in a structured format. The values can either be homogenous or heterogeneous.

Elm supports a variety of structured data types. They are:

  • Tuple
  • List
  • Record
Structured data types in Elm

Type

Function

Example

Tuple

Stores values of different types

("educative", 5, True, "good")



List

Stores multiple values of the same type

myList1 = [10, 20, 30]


Record

Stores key-value pairs

{name="educative", rating=10}


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data types

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