MATLAB Programming 30 - if...else...end statement

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.

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