x>y &&z==5 - 这个表达式的部分是如何调用的? [英] x>y && z==5 - how are parts of this expression called?

问题描述

我知道 &&这里是逻辑运算符，左边和右边的条件也是操作数，对吗?喜欢:

I know && is the logical operator here, also conditions on the left and on the right are operands, right? Like:

1+1 是一个表达式，其中 + 是运算符，数字是操作数.我只是不知道条件本身是否也称为操作数，因为它由运算符进行比较.我想是的.+

1+1 is an expression where + is the operator and the numbers are operands. I just do not know whether the condition itself is called the operand as well because it get compared by an operator. I guess so.+

谢谢

推荐答案

零件叫什么?

>、&& 和 == 都是运算符.操作数是传递给运算符的值.x、y 和 z 是初始操作数.一旦 x >y 和 z == 5 被评估，这些布尔结果用作 && 运算符的操作数，这意味着 表达式本身不是 && 的操作数，这些表达式的计算结果是操作数.

>, &&, and == are all operators. Operands are the values passed to the operators. x, y, and z are the initial operands. Once x > y and z == 5 are evaluated, those boolean results are used as the operands to the && operator which means the expressions themselves are not the operands to &&, the results of evaluation those expressions are the operands.

当您将操作数和运算符放在一起时，您会得到一个表达式(即 x > y, z == 5, boolResult == boolResult)

When you put operands and an operator together, you get an expression (i.e. x > y, z == 5, boolResult == boolResult)

他们是如何评估的?

在大多数(如果不是全部)语言中 x >y 将首先被评估.

In most (if not all) languages x > y will be evaluated first.

在支持短路的语言中，如果 x >y 是假的.否则，z == 5 是下一个.

In languages that support short circuiting, evaluation will stop if x > y is false. Otherwise, z == 5 is next.

同样，在支持短路的语言中，如果 z == 5 为假，评估将停止.否则，&& 将排在最后.

Again, in languages that support short circuiting, evaluation will stop if z == 5 is false. Otherwise, the && will come last.

>、&& 和 == 都是运算符.操作数是传递给运算符的值.x、y 和 z 是初始操作数.一旦 x >y 和 z == 5 被评估，这些布尔结果用作 && 运算符的操作数.

>, &&, and == are all operators. Operands are the values passed to the operators. x, y, and z are the initial operands. Once x > y and z == 5 are evaluated, those boolean results are used as the operands to the && operator.

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