Iff

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

In mathematical notation, "iff" is expressed as .

If a statement is an "iff" statement, then it is a biconditional statement.

Example

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

• implies ("if , then ")
• implies ("if , then ")

See Also

• Logic

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