Hello world!

in a banner text,

#     #                                #     #
#     # ###### #      #       ####     #  #  #  ####  #####  #      #####
#     # #      #      #      #    #    #  #  # #    # #    # #      #    #
####### #####  #      #      #    #    #  #  # #    # #    # #      #    #
#     # #      #      #      #    #    #  #  # #    # #####  #      #    #
#     # #      #      #      #    #    #  #  # #    # #   #  #      #    #
#     # ###### ###### ######  ####      ## ##   ####  #    # ###### #####

in my very first computer programming language a while back, C language,

#include <stdio.h>

int main(void) { 
  printf("Hello World\n"); 
}