**Absolute value of the conditional (switch. .. case ... otherwise ... end)**
This conditional syntax can only be used for conditions with a value that is not within certain intervals, can be either numeric or string. Command syntax-case switches are as follows:

switch variable

case value1

command

case value2

command

.

.

.

otherwise

command

end

For clarity, the following are examples of its use in the program:

1. In the command window, type:

>> edit

2. Press Enter, then came MATLAB Editor and you type the program under the following:

clear all;

clc

disp ('--------------------------');

disp ( 'My 7th Training Program');

disp ('--------------------------');

disp ( 'options calculation formula');

disp ('1. cube surface area');

disp ('2. Volume of the cube ');

disp ('3. Ball surface area');

disp ('4. Volume of the Ball ');

disp ( '');

select = input ( 'Your choice (1-4) ->');

switches select

case 1

disp ( 'Calculate the area of the cube');

disp ('------------------');

length = input ( 'length = box');

area = length ^ 6 * 2;

disp ([ 'cube surface area =' num2str (area)]);

case 2

disp ( 'Calculate the Volume cube');

disp ('------------------');

length = input ( 'length = box');

volume = length ^ 3;

disp ([ 'volume of the cube =' num2str (volume)]);

case 3

disp ( 'Calculate the area of the ball');

disp ('------------------');

radius = input ( 'radius of ball =');

area = 4 * pi * radius ^ 2;

disp ([ 'ball surface area =' num2str (area)]);

case 4

disp ( 'Calculate the volume of the ball');

disp ('------------------');

radius = input ( 'radius of ball =');

volume = 4 * pi * radius ^ 3 / 3;

disp ([ 'Volume of the ball =' num2str (volume)]);

otherwise

disp ( 'Your choice inconsequential !!!');

end;

3. When finished typing the above programs, you save in the directory c: / mytraining, with the name training07.m

4. Ensure your file storage directory is contained in the directory search list MATLAB. Then type the file name without the extension training06:

>> training07

5. Press Enter, then the program will run and produce as follows:

--------------------------

My 7th Training Program

--------------------------

Calculation formula options

1. cube surface area

2. Volume of the cube

3. Ball surface area

4. Volume of the Ball

Your choice (1-4) -> 2

Calculate the volume cube

------------------

long box = 3

volume of the cube = 27

6. Done