While loop stops before meeting conditions

Hi guys,

I am using a while loop with 3 conditions. Here it is :

while (X<90 && Y<90 && Z<90)

...

Or the program stop when I reach these values :

X = 87.55

Y = 87.58

Z = 93.21

Only one condition is true, so why the program stops ?

Thank you very much for your help !

[the cyclist]

This code

X = 87.55;
Y = 87.58;
Z = 93.21;

while (X<90 && Y<90 && Z<90)
    print('got here')
    break
end

does not enter the while loop for me. (Does it for you?)

Can you post your actual code that exhibits the error, so we can try?

The only thing I can think of is that maybe you have both lower- and upper-case x,y,z, and you've somehow mixed them up.

[Torsten]

As written, the program leaves the while loop if at least one condition is false - and this is the case for Z.

[Thibaut]

Thank you for your answer, here is my code. I use the program to run Ansys in batch mode.

I first launch a code to have a reference value then I do a while loop (written in Bold below).

% clean-up Matlab's workspace

% ---------------------------

clc

clear

% define some usefull variables

% -----------------------------

KEYWORD = 'Nb_Modes'; %Mot clef rechercé dans le code APDL et qui sera modifié

openMPStackSize = 'SET KMP_STACKSIZE=2048k';

pathToANSYS = '"C:\Program Files\ANSYS Inc\ANSYS Student\v194\ansys\bin\winx64\ANSYS194.exe"'; %Chemin d'accés

workingDirectory = ['"' pwd '"'];

templateScriptName1 = 'APDL.txt'; %Nom du fichier original

jobName = 'TEST';

inputFileName = [jobName '.lgw'];

outputFileName = [jobName '.out'];

fullCommand = [openMPStackSize ' & ' pathToANSYS ' -dir ' workingDirectory ' -b -j ' jobName ' -i ' inputFileName ' -o ' outputFileName];

Nombre_Modes = 50 %Variable utilisée

% clean-up the current directory

% ------------------------------

delete([jobName, '.*']);

templateScriptContents = fileread(templateScriptName1);

% replace keywords in the template script

% ---------------------------------------

inputFileContents = strrep(templateScriptContents, KEYWORD, num2str(Nombre_Modes));

%save the configured script to disk

% ----------------------------------

fileId = fopen(inputFileName, 'w+');

fprintf(fileId, '%s', inputFileContents);

fclose(fileId);

% run ANSYS

% ---------

[status, cmdout] = dos(fullCommand, '-echo');

%Lecture fichier résultats

%S=fileread('Results.txt')

A = regexp(fileread('Results.txt'),'\n','split'); %lecture du fichier contenant les résultats

whichline = find(contains(A,' sum |')); %Caractére à rechercher

% replace keywords in the template script

Modif=A(whichline); %Sélection de la ligne contenant les résultats

Modif1=erase(Modif,"sum"); %Suppression des caractéres

Modif2=erase(Modif1,"|");

%ascii value comparison, char(48) = '0' and char(57) = '9'

X=str2double(regexp(Modif2,'\d+[\.]?\d*','match','once')); % where c is your cell array; %Selection du paramètre X

X_str=num2str(X); %Transformation en string

Modif3=regexprep(Modif2,X_str,""); %Nous retirons le paramètre X

DEL1=str2double(regexp(Modif3,'\d+[\.]?\d*','match','once')); % where c is your cell array; %Nous sélectionnons le prochain paramètre pour ensuite le retirer

DEL1_str=num2str(DEL1,'%2.2f');

Modif4=regexprep(Modif3,DEL1_str,"");

Y=str2double(regexp(Modif4,'\d+[\.]?\d*','match','once')); % where c is your cell array;

Y_str=num2str(Y);

Modif5=regexprep(Modif4,Y_str,"");

DEL2=str2double(regexp(Modif5,'\d+[\.]?\d*','match','once')); % where c is your cell array

DEL2_str=num2str(DEL2,'%2.2f');

Modif6=regexprep(Modif5,DEL2_str,"");

Z=str2double(regexp(Modif6,'\d+[\.]?\d*','match','once')); % where c is your cell array

disp(X)

disp(Y)

disp(Z)

fclose('all')

while (X<90 && Y<90 && Z<90)

Nombre_Modes = Nombre_Modes + 1

% clean-up the current directory

% ------------------------------

delete([jobName, '.*']);

templateScriptContents = fileread(templateScriptName1);

% replace keywords in the template script

% ---------------------------------------

inputFileContents = strrep(templateScriptContents, KEYWORD, num2str(Nombre_Modes));

%save the configured script to disk

% ----------------------------------

fileId = fopen(inputFileName, 'w+');

fprintf(fileId, '%s', inputFileContents);

fclose(fileId);

% run ANSYS

% ---------

[status, cmdout] = dos(fullCommand, '-echo');

%Lecture fichier résultats

%S=fileread('Results.txt')

A = regexp(fileread('Results.txt'),'\n','split');

whichline = find(contains(A,' sum |'));

% replace keywords in the template script

Modif=A(whichline);

Modif1=erase(Modif,"sum");

Modif2=erase(Modif1,"|");

%ascii value comparison, char(48) = '0' and char(57) = '9'

X=str2double(regexp(Modif2,'\d+[\.]?\d*','match','once')); % where c is your cell array;

X_str=num2str(X);

Modif3=regexprep(Modif2,X_str,"");

DEL1=str2double(regexp(Modif3,'\d+[\.]?\d*','match','once')); % where c is your cell array;

DEL1_str=num2str(DEL1,'%2.2f');

Modif4=regexprep(Modif3,DEL1_str,"");

Y=str2double(regexp(Modif4,'\d+[\.]?\d*','match','once')); % where c is your cell array;

Y_str=num2str(Y);

Modif5=regexprep(Modif4,Y_str,"");

DEL2=str2double(regexp(Modif5,'\d+[\.]?\d*','match','once')); % where c is your cell array

DEL2_str=num2str(DEL2,'%2.2f');

Modif6=regexprep(Modif5,DEL2_str,"");

Z=str2double(regexp(Modif6,'\d+[\.]?\d*','match','once')); % where c is your cell array

disp(X)

disp(Y)

disp(Z)

end

Answer 1

[Srivardhan Gadila]

As mentioned by @Torsten, the program remains in the while loop "while (X<90 && Y<90 && Z<90)" only when the values of all the variables X, Y & Z are less than 90. Since the value of Z is 93.21 which is greater than 90, hence the program exits the while loop.