Not recognizing any text files in folder using dir(fullfile)

I am trying to plot data from multiple text csv files in a folder. This is the first part of my code:

folder_path = 'C:users\power\downloads\star capillary files\';  % Replace with your folder path
% List all TXT files in the folder
txt_files = dir(fullfile(folder_path, '*.txt'));
for file_idx = 1:length(txt_files)
    filename = fullfile(folder_path, txt_files(file_idx).name);
    
    % Load the TXT file
    data = readtable(filename, 'Delimiter', ',');

MATLAB is not recognizing that there are text files in my folder, though there are. I wrote a similar code to make calculations from a single txt file in that folder and it works. Does anyone know why it might not be recognizing txt files with this code? I added the folder to path in the MATLAB software by right clicking. Any help would be extremely appreciated!

[Stephen23]

"Does anyone know why it might not be recognizing txt files with this code?"

Compare:

'C:users\power\downloads\star capillary files\'  % your path
'C:\users\power\downloads\star capillary files\' % valid Windows path

Answer 1

[Voss]

Try

folder_path = 'C:\users\power\downloads\star capillary files\';

instead of

folder_path = 'C:users\power\downloads\star capillary files\';

Answer 2

[Image Analyst]

You're missing the forward slash after the drive letter and colon. Put that in. Also, your code is not very robust. You could increase the robustness by using isfolder, like

folder_path = 'C:\users\power\downloads\star capillary files\';
if ~isfolder(folder_path)
    % Folder does not exist.  Alert user:
    errorMessage = sprintf('Error: this folder does not exist:\n"%s"\nPlease select an existing folder in the next window.', folder_path)
    uiwait(errordlg(errorMessage));
    % Ask user to pick a valid folder.
    folder_path = uigetdir();
    if folder_path == 0
        % user clicked Cancel button.
        return;
    end
    % If we get to here, then folder_path is valid.
end

Then do your call to dir.