What are the basic operators in Elixir?
Elixir is a concurrent, functional programming language designed to maintain and scale applications. Today, as an introduction to Elixir, you will learn about the basic operators that this programming language offers.
Basic operators
+ - Adds two numbers
- - Subtracts second number from first number
* - Multiplies two numbers
/ - Divides two numbers
rem - Gets the remainder on division
a = 10b = 5#AdditionIO.puts(to_string(a+b))#SubtractionIO.puts(to_string(a-b))#MultiplicationIO.puts(to_string(a*b))#DivisionIO.puts(to_string(a/b))#ModuloIO.puts(to_string(rem(a,b)))
The code will create the following output:
15
5
50
2
0
Logical operators
or, and, and not are strictly boolean operators, which means that they expect their arguments to be a boolean value.
or - Checks if either value is truthy. If neither value is truthy, it returns false
and - Returns true if both values are truthy. Else it returns false
not - Unary operator that inverts the input value
Note:
orandandare short-circuit operators, which means that they will only execute the right side if the left side is not enough to determine the return value.
true and true
> true
false or true
>true
||, && and ! accept any value type. For these operators, all values will return true except false and nil.
|| - Same functionality as or, but does not expect boolean for either argument
&& - Same functionality as and, but does not expect boolean for either argument
! - Same functionality as not, but does not expect boolean for either argument
5 || true
> 5
false || 13
> 13
nil && 17
> nil
true && 12
> 12
Comparison operators
== - Checks if values are equal (type casts values if they are not the same type)
!= - Checks if values are not equal
=== - Check if values have the same data type and the same values
!== - Checks if values are of the same data type and have different values
> - Checks if the value on the left is greater than the value on the right
< - Checks if the value on the right is greater than the value on the left
>= - Checks if the value on the left is greater than or equal to the value on the right
<= - Checks if the value on the right is greater than or equal to the value on the left
2 == 2
> true
2 != 4
> true
1 <= 2
> true
5 == 5.0
> true
5 === 5.0
> false
Other operators
Elixir offers ++ and -- to manipulate lists
++ - Concatenates two lists into one list
-- - Removes elements from a list
[1, 2, 6] ++ [7, 10, 15]
> [1, 2, 6, 7, 10, 15]
[1, 2, 6, 9] -- [6]
> [1, 2, 9]
<> - Concatenates two strings
"Hel" <> "lo"
> "Hello"
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