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fwrite

format:            #fwrite {string} {1} {length) {FILE}

FILE is $_ from #fopen.
The variable _ is set to the number of items successfully written.

If an error occurs, or the end-of-file is reached, the return
value is a short item count (or zero).

length is limited to 2048; you cannot write bytes that contains '\0' either.

See help on C function: size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);


See also: #fopen/#fclose, #feof, #fseek, #fgets, #fputs, #fread, #fwrite, #remove, #rename, #sysecho