C fclose() function is a C library function that releases the memory stream opened by the fopen() function. This tutorial guides you on how to use the fclose() function in the C program. The basic format of the fclose is:


int fclose( FILE * stream );

Return Value

The C close() function returns EOF in case of failure and returns 0 on success.



int main()
    FILE *fp;
    fp = fopen("fileName.txt","w");
    fprintf(fp, "%s", "Sample Texts");
    return 0; 


  • The above example will create a file called fileName.txt.
  • The w means that the file is being opened for writing, and if the file does not exist, then the new file will be created.
  • The fprintf() function writes Sample Texts text to the file.
  • The fclose() function closes the file and releases the memory stream.

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