有一個猜字遊戲，現在的情況是，計算機隨機生成一個整數，這個整數的區間我們事先給定，這裡假定數在0到100之間，然後我們猜字，當猜的數大於生成的整數時，輸出“Your answer is too large.”，當猜的數小於生成的整數時，輸出“Your answer is too small.”，猜中數字輸出“BINGO!!”，結束遊戲，下面是python的指令碼，以及測試情況：

def main():
	import random
	a=random.randint(0,100)
	print('Guess what i think?')
	b=int(input('Enter a number:'))
	while(b!=a):
		if(b<a):
			print('Your answer is too small.')
		elif(b>a):
			print('Your answer is too large.')
		b=int(input('Enter a number:'))
	print('BINGO!!')
 

測試結果：

>>> main()
Guess what i think?
Enter a number:0
Your answer is too small.
Enter a number:100
Your answer is too large.
Enter a number:50
Your answer is too large.
Enter a number:25
Your answer is too small.
Enter a number:37
Your answer is too small.
Enter a number:43
Your answer is too large.
Enter a number:40
Your answer is too small.
Enter a number:42
Your answer is too large.
Enter a number:41
BINGO!!