ftell

Returns the offset of the current byte relative to the beginning of a file.

📝 Syntax

• p = ftell(fid)

📥 Input argument

• fid - a file descriptor

📤 Output argument

• p - an integer value: position of the file pointer as the number of characters from the beginning of the file.

📄 Description

ftell returns the offset of the current byte relative to the beginning of the file associated with the named stream fid.

💡 Example

TXT = 'example about ftell.';
fileID = fopen([tempdir(), 'ftell.txt'],'wt');
fprintf(fileID, TXT);
p1 = ftell(fileID)
fseek(fileID, SEEK_CUR, 'bof');
p2 = ftell(fileID)
status = fclose(fileID);

🔗 See also

fopen, fprintf, fclose, fseek.

🕔 History

Version	📄 Description
1.0.0	initial version