Iff

Iff is an abbreviation for the phrase "if and only if."

In mathematical notation, "iff" is expressed as .

It is also known as a biconditional statement.

An iff statement means and at the same time.

Example

In order to prove a statement of the form " iff ," it is necessary to prove two distinct implications:

• if then
• if then

Videos

Mathematical Logic (I am in process of making a smoother version of this -themathematicianisin).

See Also

• Logic

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