C Hello World program
gd.c
#include <stdio.h>
int main()
{
    printf("Hello, World!\n");

    char *str = "Hello, World!\n";
    printf("%s", str);

    puts("Hello, World!\n");

    printf("%c%c%c%c%c%c%c%c%c%c%c\n", 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100);
    return 0;
}
Output
godarda@gd:~$ gcc gd.c
godarda@gd:~$ ./a.out
Hello, World!
Hello, World!
Hello, World!
Hello, World!
godarda@gd:~$
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