11.2) if...elseif...else...end Statement

Flow control statements allow blocks of code to execute if particular conditions are met
The simplest type is the "if" statement. If an expression is satisfied, then execute the statement. "if" statements are terminated with an "end". The syntax is as follows:

[matlab]
if (logical_expression)
statement
end
[/matlab]

"if" statements can container alternative choices specified by "else" and "elseif". The full syntax is as follows:

[matlab]
if (logical_expression1)
statement1
elseif (logical_expression2)
statement2
else
statement3
end
[/matlab]

If "logical_expression1" is satisfied, then execute "statement1". If it isn't satisfied, see if "logical_expression2" is satisfied. If it is then execute "statement2", "else" execute "statement2"