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与(&&)逻辑或(||),动态绑定结合三目运算
2022-06-24 06:43:00 【我不喝奶茶还是胖】
与(&&)
作用于两到多个值,并且只有所有的操作数都是真值时,才为true。
1.第一个操作数为真:会进入第二个操作数的判断,且无论第二个操作数真假,都会返回第二个操作数。
2.第一个操作数为假:不会进入第二个操作数的判断,直接返回第一个操作数。
或(||)
同样是作用于两到多个值,但是只要有一个操作数为真,就返回真。
1.如果第一个操作数为真,则不会进入第二个数的判断。所以无论第二个操作数真假,都直接返回第一个操作数
2.如果第一个操作数为假,则会进入第二个数的判断。但是无论第二个操作数真假,都直接返回第二个操作数
动态绑定结合三目运算

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