Python if and input

input用于输入流的捕捉:

#!/usr/bin/python
# Filename: if.py
number = 23
guess = int(raw_input('Enter an integer : '))
if guess == number:
print 'Congratulations, you guessed it.' # New block starts here
print "(but you do not win any prizes!)" # New block ends here
elif guess < number:
print 'No, it is a little higher than that' # Another block
# You can do whatever you want in a block ...
else:
print 'No, it is a little lower than that'
# you must have guess > number to reach here
print 'Done'
# This last statement is always executed, after the if statement is executed

执行结果:

Enter an integer: 20

No, it is a little higher than that

Enter an integer: 30

No, it is a little lower than that

Enter an integer: 23

Congratulations, you guessed it.

(but you do not win any prizes!)

The while loop is over.

Done