C

c memset

#include <string.h> // memset(void *, char, size_t)

int main(void) {
  char buff[1024];
  memset(buff, '', 1024);
  /*
  Initialize the first 1024 bytes of buff with ''
  */
  return 0;
}

memset c

This is string.h library function
$$$$$$$ string.h library function