How to create for and if loops instead of while

Hi all,

I am quit new to matlab and wondering if possible to write for with if loop instead of while: (as It is required to link that file to another programme that does not read while.

So here is the matlab code example:

x = 1;  
st = 0;
y = 1;
z = 1; 

while y <= 20
    switch (st)
        case 1 
            display('CASE ONE')
       
            st = 2;
            
        case 2 
            while   display('CASE TWO')
            end
            st = 3;
        
        otherwise 
            display('OTHERS')
    end
end

Hope anyone can help and guide me how to write the same example but without while loop

[Image Analyst]

That's an infinite loop because you never change y within the loop. You need to change y or else the loop will never exit. What is your equation for how y changes?

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[Jan]

Note, that "if loop" is not a meaningful expression.

The current code displays 'OTHERS' in an infinite loop. What is the intention to modify the code?

Answer 1

[Jan]

WHILE and FOR loops are equivalent:

k = 1;
while k <= 100
    ...
    k = k + 1;
end

and

for k = 1:100
    ...
end

[Mark Sc]

@Jan

Thank you for your prompt reply.

May I ask what is the meaing of switch (st) in the code ??

What is the meaning of cases ?? if it something like if ??

how can I terminate the loop ?

The intent os modifying the code with for and if is as I had mentioned earlier, that code should work in other program which does not suppport while statement

So I wish you could help me.. if possible and tell me more what is the meaning of both switch and case

Thanks,

[Image Analyst]

switch, case, otherwise is basically like a bunch of if/elseif blocks.

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[Mark Sc]

@Image Analyst

Thanks! got it...

but just a question how can I exit without the need to repeat 100 iteration..

I mean I understand I have to add if

but what if I found what I am looking how can I stop and go out from the loop

[Image Analyst]

@Mark Sc in a for loop or while loop you test some condition and then call break to immediately leave the loop.

for k = 1 : 10000
    if iWantToExitLoop
        break; % Bail out of for loop completely.  Also works with while loops.
    end
end

Not sure what condition you want to check to bail out, but that's basically it.