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数据类型 :
print("1.数字")
print("整数:",type(1))
print("小数:",type(1.23))
print("2.字符串")
print("单引号:",type('1'))
print("双引号:",type("11"))
print("三引号:",type('''fidfgighg'''))
print("3.元组")
print("元组:",type((1,2,3,4)))
print("4.列表")
print("列表:",type([1,2,3,4]))
print("5.集合")
print("集合:",type({1,2,3,4}))
print("6.字典")
print("字典:",type({'1':33,'2':22,'3':44,'4':77}))
执行结果
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数学运算:
#+ - * / // % **
print("1.加法")
print("2+3 =",2+3)
print("2.减法")
print("9-3 =",9-3)
print("3.乘法")
print("9*3 =",9*3)
print("4.除法")
print("11/4 =",11/4)
print("5.幂")
print("3**3=",3**3)
print("6.整除")
print("11//4=",11//4)
print("7.取余")
print("11%4=",11%4)
执行结果
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赋值运算:
#= += -= *= /= **= //= %=
print("a=3")
a=3
print("a+=3")
a+=3
print("a=",a)
print("a-=2")
a-=2
print("a=",a)
print("a*=2")
a*=2
print("a=",a)
print("a/=2")
a/=2
print("a=",a)
print("a**=3")
a**=3
print("a=",a)
print("a//=3")
a//=3
print("a=",a)
print("a%=2")
a%=2
print("a=",a)
执行结果
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逻辑运算:
#and or not
#如果两个都正确,输出后面的。如果一个对一个错,第一个对直接输出,第一个错,直接输出
print("5 and 4=",5 and 4)
print("4 and 5=",4 and 5)
print("5 and 0=",5 and 0)
print("0 and 4=",0 and 4)
#如果两个都正确,判断第一个正确后直接输出。如果一个对一个错,第一个正确直接输出,第一个错继续判断后一个,正确则输出
print("5 or 4=",5 or 4)
print("4 or 5=",4 or 5)
print("5 or 0=",5 or 0)
print("0 or 4=",0 or 4)
print("not 1=",not 1)
print("not 0=",not 0)
执行结果
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比较运算:
#> < == >= <= !=
print("5 > 4:",5 > 4)
print("5 < 4:",5 < 4)
print("4 < 5;",4 < 5)
print("4 > 5:",4 > 5)
print("5 == 5:",5 == 5)
print("0 >= 4:",0 >= 4)
print("0 <= 4:",0 <= 4)
print("5 >= 4;",5 >= 4)
print("5 <= 4;",5 <= 4)
print("5 != 4;",5 != 4)
执行结果
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关系运算:
#in not in is not is
print("a=5")
a=5
print("b=3")
b=3
print("c={1,2,3,4}")
c={1,2,3,4}
print("d={1,2,3,4,5}")
d={1,2,3,4}
print("a in c:",a in c)
print("a not in c:",a not in c)
print("b in d:",b in d)
print("b not in d:",b not in d)
print("a=5")
a=5
print("b=5")
b=5
print("a is b:",a is b)
print("a is not b:",a is not b)
print("c={1,2,3,4}")
c={1,2,3,4}
print("d={1,2,3,4}")
d={1,2,3,4}
print("c is d:",c is d)
print("c is not d:",c is not d)
执行结果
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位运算:
#& | ~ ^ >> <<
print("a=12")
a=12
print("b=10")
b=10
print("\n")
#与,或,异或,取反是根据数的二进制码来计算
print("与运算")
print("a&b= ",a&b)
print("或运算")
print("a|b= ",a|b)
print("异或运算")
print("a^b =",a^b)
print("a取反运算")
print("~a =",~a)
print("b取反运算")
print("~b =",~b)
print("\n")
#a右移,右移除以2的(移动次数方)
print("右移")
print("a>>1=",a>>1)
print("右移")
print("a>>2=",a>>2)
print("右移")
print("a>>3=",a>>3)
print("\n")
#b左移,左移乘以2的(移动次数方)
print("左移")
print("b<<1=",b<<1)
print("左移")
print("b<<2=",b<<2)
print("左移")
print("b<<3=",b<<3)