1. 且或非 最好用括号,先计算括号内
执行顺序:
从前到后
结果
True OR ==>True
True AND ==>继续走
False OR ==>继续走
False OR ==>False
2. 几大符号归类
结果是值:算数运算(a = 10*10),赋值运算 (a = a+1 / a += 1)
结果是布尔值:比较运算(a = 1<5),逻辑运算(a = 1< 6 or 1==1),成员运算(a = "b" in "biology")
1. 且或非 最好用括号,先计算括号内
执行顺序:
从前到后
结果
True OR ==>True
True AND ==>继续走
False OR ==>继续走
False OR ==>False
2. 几大符号归类
结果是值:算数运算(a = 10*10),赋值运算 (a = a+1 / a += 1)
结果是布尔值:比较运算(a = 1<5),逻辑运算(a = 1< 6 or 1==1),成员运算(a = "b" in "biology")