How to use If else statements?

Hi everyone, I have tried programming in Matlab to check if a number is in the range of 10-20 (use if-else), but I couldn't get the exected results.

Can I get help please?

Thank you in advance for your help.

Answer 1

[Jiahao CHANG]

Hi Danny,

For using if-else function, I recommend you to type <help if> in matlab command line or this link if, elseif, else to see the documentation of how to use help function.

I will show you an example to check if a number is in 10-20. But Im not sure whether it is want you want to see unless you could show us more details about your script.

i = input('please enter a number:');
if i<=20&&i>=10
    disp('this number is in the range of 10-20');
else
    disp('this number is NOT in the range of 10-20');
end

[Danny Maefengea]

Thank you sir for your help.

[Jiahao CHANG]

You're welcome! If you have any other confusing things don't hesitate to ask me ;)

Answer 2

[Danny Maefengea]

Consider the following code fragment:

forx = 1 : 5

fory = 1 : 3

disp('LOVE MELB');

end

disp('LOVE VU');

• How many times will the phrase ‘LOVE MELB’ be printed? 15 times.What are the corresponding x and y values during each iteration? The corresponding x values are 5, corresponding y values are 3.
• How many times will the phrase ‘LOVE VU’ be printed? 5 times .What are the corresponding x and y values during each iteration? Corresponding x values are 3, corresponding y values are 5

[Danny Maefengea]

sir I have this question and written in bold are my answers. can u please check them and see if they are correct?

Thank you so much for your help

[Jiahao CHANG]

<‘LOVE MELB’ be printed? 15 times> and <‘LOVE VU’ be printed? 5 times> are right obviously.

For each interation about 'LOVE MELB', the x and y value are different. For each x from 1 to 5, y equals to 1,2 and 3.

For each interation about 'LOVE VU', the x value are different. x varie from 1 to 5, but y always equals to 3.

It's not very clear to explain this by words. I suggest you to set breakpoints on line 3 then see how Matlab program by seeing how the x and y value change in the workspace.

for x = 1 : 5
    for y = 1 : 3
        disp('LOVE MELB');
    end
    disp('LOVE VU');
end