Iff

Pro Tip 1/3

Mathematical Precision

Used for precise conditions in math and logic, where 'if' alone is insufficient.

A square is a rectangle iff all angles are 90 degrees.

Pro Tip 2/3

Not Common Speech

Rare in everyday language; primarily found in technical or academic contexts.

He's not using 'iff' because it's a casual conversation, not a math class.

Pro Tip 3/3

Double F Not Mistake

'iff' isn't a typo for 'if'; the double 'f' is intentional to mean a stronger condition.

I'll agree iff you provide concrete evidence.