code:

10 PRINT "HELLO WORLD"
20 END

code:

program Hello(input, output);
   begin
     writeln ('Hello world');
   end 

code:

(defun hello
   (print
         (cons 'HELLO (list 'WORLD)))) 

code:

#include <stdio.h>
main (argc,argv)
  int argc;
  char **argv; {
  printf ("Hello World!\n");
 } 

code:

#include <stream.h> 

const int MAXLEN = 80; 

class outstring;

class outstring {
  private: 
    int size;
    char str[MAXLEN]; 
  public:
    outstring() { size=0; }
    ~outstring() {size=0;}
    void print();
    void assign(char *chrs);
 };
    
void outstring::print() {
  int i;
  for (i=0 ; i< size ; i++)
    cout << str;
  cout << "\n";
 }
 
void outstring::assign(char *chrs) {
  int i;
  for (i=0; chrs[i] != '0';i++)
    str[i] = chrs[i];
  size=i;
} 

main (int argc, char **argv)  {
  outstring string; 
  string.assign("Hello World!");
  string.print();
}