If and Only If
⇔
Type it
| Unicode | U+21D4 | |
|---|---|---|
| LaTeX | \Leftrightarrow | |
| HTML entity | ⇔ | |
| Character | ⇔ |
Meaning
States that two statements imply each other, so they are either both true or both false. Compare with Implies and Left Right Arrow.
How to read it
P ⇔ Q
is read “P if and only if Q”.