# Iverson bracket

## English[edit]

### Etymology[edit]

Named after Kenneth E. Iverson, who introduced this notation in his programming language APL.

### Noun[edit]

**Iverson bracket** (*plural* **Iverson brackets**)

- (mathematics) A notation that denotes a number that is 1 if the condition in square brackets is satisfied, and 0 otherwise, i.e. (where P is a true or false statement)