Erlang - Nested if Statements


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Sometimes, there is a requirement to have multiple if statements embedded inside of each other, as is possible in other programming languages. In Erlang also this is possible.

The following image is a diagram representation of the Nested if statement.

Nested if Statements

An example of this is shown in the following program −

Example

-module(helloworld). 
-export([start/0]). 

start() -> 
   A = 4, 
   B = 6, 
   if 
      A < B ->
         if 
            A > 5 -> 
               io:fwrite("A is greater than 5"); 
            true -> 
               io:fwrite("A is less than 5")
         end;
      true -> 
         io:fwrite("A is greater than B") 
   end.

In the above program the following point should be noted −

  • When the first if condition is evaluated to true, then it starts the evaluation of the second if condition.

The output of the above code will be −

Output

A is less than 5
erlang_decision_making.htm
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