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== Conditional Statements == A conditional statement is a fundamental concept in programming that allows code execution based on certain conditions. Elixir provides several conditional statements, such as `if`, `unless`, `case`, and `cond`, to control the flow of your program based on specific conditions. === The `if` Statement === The `if` statement in Elixir allows you to execute a block of code only if a given condition is true. Here is the basic syntax: ```elixir if condition do # Code to execute if condition is true else # Code to execute if condition is false end ``` === The `unless` Statement === The `unless` statement is the opposite of the `if` statement. It executes a block of code only if the provided condition is false. Here is the syntax: ```elixir unless condition do # Code to execute if condition is false else # Code to execute if condition is true end ``` === The `case` Statement === The `case` statement allows for pattern matching on a given value. It compares the given value against different patterns, executing the code block corresponding to the first matching pattern. Here is an example: ```elixir case value do pattern1 -> # Code to execute if pattern1 matches value pattern2 -> # Code to execute if pattern2 matches value _ -> # Code to execute if no patterns match value end ``` === The `cond` Statement === The `cond` statement is useful when you need to check multiple conditions in sequence. It evaluates each condition one by one until it finds a `true` condition, then executes the corresponding code block. Here is an example: ```elixir cond do condition1 -> # Code to execute if condition1 is true condition2 -> # Code to execute if condition2 is true true -> # Code to execute if no previous conditions are true end ``` === Logical Operators === In Elixir, you can use logical operators such as `and`, `or`, and `not` in conditional statements to combine or invert conditions. These operators allow for more complex conditions to be evaluated. Here is an example: ```elixir if condition1 and condition2 do # Code to execute if both condition1 and condition2 are true end ``` === Conclusion === Conditional statements are an essential part of any programming language, and Elixir provides powerful constructs to handle different conditions in your code. By using `if`, `unless`, `case`, and `cond`, as well as logical operators, you can control the flow of your Elixir programs based on specific conditions. {{stub}} {{Category:Elixir Programming}} {{Category:Control Structures}} {{Category:Flow Control}}
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