Python学习笔记-day1（if流程控制)

在python中，流程控制语句为强制缩进（4空格）

if username=='lmc' and password=='123456':
    print('Welcome User {name} login...'.format(name=username))
else:
    print('Invalid username or password')

不能这样写：

if 条件：

    do something...

else:

    do something...

 print（）#这个语句前敲了1个空格

会显示IndentationError(缩进错误）

Tips：顶级代码必须顶格写

guess= 512
def guess_num(guess):
    num = int(input("Please Guess The Luck Number :"))
    if num == guess:
        print('Congratulations!It is Luck Number!')
    elif num < guess:
        print('Think bigger... ')
        guess_num(guess)
    else:
        print('Think smaller...')
        guess_num(guess)
    return
guess_num(guess)

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