#include <stdio.h>
int main(void)
{
 printf("Hello World!\n");
}

#include <stdio.h>
int main(void)
{
printf("Some say the world will end in fire,\n");
printf("Some say in ice.\n");
printf("From what I’ve tasted of desire\n");
printf("I hold with those who favor fire.\n");
printf("But if it had to perish twice,\n");
printf("I think I know enough of hate\n");
printf("To say that for destruction ice is also great\n");
printf("And would suffice.\n");
}

#include <stdio.h>
int main(void)
{
 int number;
 printf("Enter a number:");
 scanf("%d",&number);
 printf("\n");
 printf("Number you entered : %d\n",number);
 return 0;
}