What is fclose() function ?

• Closes a file which has been opened for use.
• A file must be closed as soon as all operation on it have been completed.
• If you not close a file after the operation, data or file can be damaged.
• It prevents any accidental misuse of the file.
• If we want to open a file in another mode first we close the open file.

Syntax:

     fclose ( file_pointer );

ex:

     FILE *fp;

     fp = fopen (“ data “,” w “);

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     fclose ( fp );