Excel file not found

How can I make sure that the Excel file is in the current location of Matlab, and in the absence of it I create it from Matlab, the problem arises when I write for the first time . when I read the Excel file for the purpose of determining the current location of the writing, the error appears that the file does not exist (File 'C:\Users\kh\Documents\MATLAB\testall.xlsx' not found.)

for i=1:4
[complete2] = xlsread('testall.xlsx');
 lr = size(complete2,1);
 range = ['A',num2str(lr+1)];
 xlswrite('testall.xlsx',ROIRmom(i).mom,1,range);
end

[Walter Roberson]

filename = 'testall.xlsx';
if ~exist(filename, 'file')
    file does not exist yet, do something
end

[...]
complete2 = xlsread(filename);
[...]
xlswrite(filename, and so on)

[khalida basheer]

filename = 'ccl.xlsx';

if ~exist(filename, 'file')

% % file does not exist yet, do something

xlswrite('ccl.xlsx',ROIlmom(1).mom,1,'A1');

for i=2:4

[complete2] = xlsread('ccl.xlsx');

lr = size(complete2,1);

range = ['A',num2str(lr+1)];

xlswrite('ccl.xlsx',ROIlmom(i).mom,1,range);

end

else

for i=1:4

[complete2] = xlsread('ccl.xlsx');

lr = size(complete2,1);

range = ['A',num2str(lr+1)];

xlswrite('ccl.xlsx',ROIlmom(i).mom,1,range);

end

end

The code worked by this way. I selected the storage method based on the presence and absence of the Excel file. Is this a good way????