WebThe IF AND excel statement is the two logical functions often nested together. Syntax: “=IF (AND (Condition1,Condition2, value_if_true,vaue_if_false)”. The IF formula is used to test and compare the conditions expressed, along with the expected value. It provides the desired result if the condition is either “true” or “false.”. Web3 jun. 2014 · 当且仅当(英文：If and only if)，表示“在，并且仅在这些条件成立的时候”的缩写，在英语中的对应标记为iff 用 P当且仅当Q 来举例。 当： 当Q成立时，P成立。

将 IF 函数与 AND、OR 以及 NOT 函数配合使用 - Microsoft 支持

WebOnly if we handle them with kid gloves . 只要我們小心行事就行了。 I 'll do that , but only if we set a few rules . 我會做，但我們得定幾條規矩。 Only if he turns over a new leaf . 除非他重新做人。 We can succeed only if everyone in the team pulls his weight . 我們全隊只有人人各盡所能才能取得成功。 Web当且仅当(英文：If and only if)，表示“在，并且仅在这些条件成立的时候”的缩写，在英语中的对应标记为iff. 用 P当且仅当Q 来举例。 当： 当Q成立时，P成立。 所以P的充分条件是Q; 仅当： 仅当Q成立时，P才成立。也就是说，当Q不成立时，P也不成立。 ibx internship

if and only if - Wiktionary

WebOnly if introduces a necessary condition: P only if Q means that the truth of Q is necessary, or required, in order for P to be true. That is, P only if Q rules out just one possibility: that P is true and Q is false. But that is exactly what P → Q rules out. So it’s obviously correct to read P → Q as P only if Q. Web接続詞. if and only if. ( logic, mathematics) Is equivalent to; implies and is implied by; is true and false in the same cases as. A rectangle is a square if and only if all four of its sides have the same length. An integer is even if and only if its square is also even. ( by extension, informal) If, with added intensity. WebA if and only if B 【論理学】 条件 B のとき、そのときに限り A が成り立つ。数学、論理学で必要十分条件に用いる。 例: f(x) = f(y) if and only if x = y. x = y ならばf(x) = f(y)が成り立つ。x = y 以外では成り立たない。 関連語 . if; iff; ↔; ⇔ ibx mason co wv