iff
🇺🇸
/ɪf/
🇬🇧
/ɪf/
conjunction
R
A word used in math to show that two things are true at the same time, like a special kind of 'if'.
The answer is 42 iff you multiply 6 by 7.
如果你把6乘以7，那么答案就是42。
translation
当且仅当