Question

Please answer the following question. Thank you!

For this assignment you must write the following functions in Scheme:

1.2 Write a function called countdown that takes a positive integer and uses a do expression to display a sequence of numbers counting down to 1, each on its own line, then displaying the string "Blastoff!".
> (countdown 5)

5

4

3

2

1

Blastoff!

Answer 1

#code in scheme

(define (countdown n)
(if(= n 0)
display("Blastoff!"))
(else (display n) (countdown (- n 1))))

the call (countdown 5)

#code in c language

#include<stdio.h>
void countdown(int n)
{
   if(n==0)
   {
       printf("Blastoff!");
   }
   else
   {
       printf("%d\n",n);
       countdown(n-1);
   }
}
int main()
{
   int num;
   printf("enter the number\n");
   scanf("%d",&num);
   countdown(num);
   return 0;
}