`fclose`

Closes an open file.

Category: Data Import and Analysis > Data Import and Export

Syntax

status = fclose(fid)

Closes the file with identifier fid.

status = fclose('all')

Closes every file opened with fopen.

Description

Always close files you write to: data may sit in a buffer until the file is closed, and another program may not be able to open it meanwhile. After fclose, the identifier can no longer be used.

Input arguments

fid: File identifier returned by fopen.

Output arguments

status: 0 on success, -1 if the identifier was not valid.

Example

Write, close, read

fid = fopen('c.txt', 'w');
fprintf(fid, 'saved\n');
status = fclose(fid)
disp(fileread('c.txt'))

Output

status = 0
saved

fclose