云学编程的第9天—【微软官方python入门教程 P19-P20笔记】2021-11-09 if条件语句

原创于 2021-11-09 15:50:23 发布 · 274 阅读

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本文是云学编程的第9天笔记，聚焦微软官方Python入门教程的P19和P20部分。讲解了如何处理条件语句，包括比较运算符如>、<、>=、<=、==和!=。特别强调了在比较字符串时需要注意的事项。通过实例展示了代码如何根据不同的支付金额和税率来计算税款，揭示了条件语句使代码能够对不同情况作出反应的重要性。

P19 Handling conditions

Your code needs the ability to take different actions based on different conditions.

if price >= 1.00:
    tax=.07
eles:
    tax=0
    print(tax)

# > # < # >= # <= # == # !=

Be careful when comparing strings

conuntry='CANADA'
if conuntry.lower()=='canada':
    print('oh look a canadian')
else:
    print('you are not from canada')

Conditions allow our code to react to different situations

P20 实操

price=input('how much did you pay?')
price=float(price)
if price >=1.00:
    tax= .07
    print('Tax rate is: '+str(tax))
else:
    price <1.00
    tax=0
    print('Tax rate is: '+str(tax))

price=input('how much did you pay?')
price=float(price)
if price >=1.00:
    tax =.07 
else:
    tax=0
print('Tax rate is: '+str(tax))

how much did you pay?9
Tax rate is: 0.07
how much did you pay?0.1
Tax rate is: 0

showing you the case sensitivity

country=input('enter the name of your home country: ')
if country.lower()=='canada':
    print('so you must like hockey!')
else:
    print('you are not from canada')