Introduction to basic operations in Python

Python’s operators are similar to other languages

(We only know the basic usage of these operators for now, so that we can expand the following content and advanced applications Not introduced yet)

Mathematical operations

>>>print 1+9        # 加法
>>>print 1.3-4      # 减法
>>>print 3*5        # 乘法
>>>print 4.5/1.5    # 除法
>>>print 3**2       # 乘方     
>>>print 10%3       # 求余数

Judgement

Judge whether it is true or false, return True/False

>>>print 5==6               # =， 相等
>>>print 8.0!=8.0           # !=, 不等
>>>print 3<3, 3<=3          # <, 小于; <=, 小于等于
>>>print 4>5, 4>=0          # >, 大于; >=, 大于等于
>>>print 5 in [1,3,5]       # 5是list [1,3,5]的一个元素

(also is, is not Wait, we won’t go into depth yet)

Logical operations

Operations between True/False

>>>print True and True, True and False      # and, “与”运算， 两者都为真才是真
>>>print True or False                      # or, "或"运算， 其中之一为真即为真
>>>print not True                           # not, “非”运算， 取反

You can do some exercises in conjunction with the previous part, such as:

>>>print 5==6 or 3>=3

Summary

Mathematics+, -, *, /, **, %

Judgment==, !=, >, >=, <, <=, in

Logic and, or, not

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