def countdown(n):
while n > 0:
    print (n)
    n = n =2**123
print('Blastoff')

countdown(200)

n = n =2**123

n = n - 1

n -= 1

def countdown(n):
     while n > 0:
         print (n)
         n = n-1
     print("Blastoff")

def countdown(n):
    for i in reversed( range(n) ):
        print i
    print "Blastoff"

#!/usr/bin/python

def countdown(count):
    while (count >= 0):
        print ('The count is: ', count)
        count -= 1

countdown(10)
print ("Good bye!")

#!/usr/bin/python

import time

def countdown(count):
    while (count >= 0):
        print ('The count is: ', count)
        count -= 1
        time.sleep(1)

countdown(10)
print ("Good bye!")

The count is:  10
The count is:  9
The count is:  8
The count is:  7
The count is:  6
The count is:  5
The count is:  4
The count is:  3
The count is:  2
The count is:  1
The count is:  0
Good bye!

for n in range(10,0,-1):
    print(n)

#this is generator function
def countdown(start,last):
    n=start
    while(n>last):
        yield n
        n-=1

for n in countdown(10,0):
    print(n)

import time
num1 = 100
num2 = 0
while (num1 > num2):
    print num1
    num1 = num1 - 1
    time.sleep(1)

import time
start = int(input("How many seconds do you want?nSeconds: "))
for i in range(start,-1,-1):
    time.sleep(1)
    print(i)
print "Countdown finish!"

import time

numTimes = int(input("How Many Seconds Do You Wish To Have Untill LiftOff: "))
def countdown(count):
    while (count >= 0):
        print ("LiftOff In: ", count)
        count -= 1
        time.sleep(1)

countdown(numTimes)
print ("!WE HAVE LIFT OFF!")

def countdown (n):
    print n

    while n > 1:
        n=n-1
        print n

    print "Blastoff!"