MATLAB - The if...else...end Statement

An if statement can be followed by an optional else statement, which executes when the expression is false.

Syntax:

The syntax of an if...else statement in MATLAB is:

if <expression>
% statement(s) will execute if the boolean expression is true 
<statement(s)>
else
<statement(s)>
% statement(s) will execute if the boolean expression is false 
end

If the boolean expression evaluates to true, then the if block of code will be executed, otherwise else block of code will be executed.

Flow Diagram:

Example:

Create a script file and type the following code:

a = 100;
% check the boolean condition 
   if a < 20 
        % if condition is true then print the following 
       fprintf('a is less than 20\n' );
   else
       % if condition is false then print the following 
       fprintf('a is not less than 20\n' );
   end
   fprintf('value of a is : %d\n', a);

When the above code is compiled and executed, it produces the following result:

a is not less than 20
value of a is : 100