Question

Trying Blastoff activity from Chapter 4. See below, have only added input prompt.
Does not work.

n = input("input ")
def countdown(n):
if n == 0:
print "Blastoff!"
else:
print n
countdown(n-1)

Answer 1

You have to call the `countdown` function at least once.

```
def countdown(n):
if n == 0:
print "Blastoff!"
else:
print n
countdown(n-1)

n = input("input ")
countdown(n) # Call the function otherwise nothing happens
```

Answer 2

The syntax of your print statement suggests that this is Python v2.x. In v2, use raw_input() instead:

n = int( raw_input( "input " ) )

BTW, raw_input() returns a string, that's why it's surrounded by the int() function, to convert what was typed to an int.

If this is Python v3, then your print statement is wrong. Print returned to being a function in v3:

print( n )

FYI, congratulations on writing this recursively! Hold onto the code for later in your course.