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Differences between the various equal operators in Elixir
Azeem AshrafEquality operator
In Elixir, there are three types of equality operators:
=: This operator is used for pattern matching.==: This operator compares if the LHS value equals the RHS value.===: This operator checks whether both sides have the same data types and then compares if LHS value equals RHS value.
Operator | Name | Expression | Return |
|
|
| 1 |
| Equal to |
| True |
| Strictly equal to |
| False |
Inequality operator
There are two types of inequality operators:
-
!=: This operator is used to compare if the LHS value does not equal the RHS value. -
!==: This operator checks if both data types are not the same and then compares if the LHS value does not equal the RHS value.
Operator | Name | Expression | Return |
| Unequal to |
| True |
| Strictly unequal to |
| True |
Example
Let’s look at the example below:
# = Operartor IO.puts "= Operator: Pattern Matching: 1 = 1" #IO.puts "Pattern Matching:" IO.puts 1 = 1 IO.puts "\n" # == Operator IO.puts "== Operator" IO.puts "Same value and same data type: 2 == 2" IO.puts 2 == 2 IO.puts "\n" IO.puts "Same value and different data type: 2 == 2.0" IO.puts 2 == 2.0 IO.puts "\n" IO.puts "Differnet value and same data type: 2 == 3" IO.puts 2 == 3 IO.puts "\n" IO.puts "Differnet value and differnet data type: 2 == 3.0" IO.puts 2 == 3.0 IO.puts "\n" # === Operator IO.puts "=== Operator" IO.puts "Same value and same data type: 2 === 2" IO.puts 2 === 2 IO.puts "\n" IO.puts "Same value and different data type: 2 === 2.0" IO.puts 2 === 2.0 IO.puts "\n" IO.puts "Differnet value and same data type: 2 === 3" IO.puts 2 === 3 IO.puts "\n" IO.puts "Differnet value and differnet data type: 2 === 3.0" IO.puts 2 === 3.0 IO.puts "\n" # != Operator IO.puts "!= Operator" IO.puts "Same value and different data type: 1 != 1.0" IO.puts 1 != 1.0 IO.puts "\n" IO.puts "Same value and same data type: 1 != 1" IO.puts 1 != 1 IO.puts "\n" IO.puts "Different value and same data type: 1 != 2" IO.puts 1 != 2 IO.puts "\n" IO.puts "Different value and different data type: 1 != 2.0" IO.puts 1 != 2.0 IO.puts "\n" # !== Operator IO.puts "!== Operator" IO.puts "Same value and different data type: 1 !== 1.0" IO.puts 1 !== 1.0 IO.puts "\n" IO.puts "Same value and same data type: 1 !== 1" IO.puts 1 !== 1 IO.puts "\n" IO.puts "Different value and same data type: 1 !== 2" IO.puts 1 !== 2 IO.puts "\n" IO.puts "Different value and different data type: 1 !== 2.0" IO.puts 1 !== 2.0
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