# all

Determine if all array elements are nonzero or `true`

## Description

tests
along the first array dimension of `B`

= all(`A`

)`A`

whose size does not equal 1,
and determines if the elements are all nonzero or logical `1`

(`true`

). In practice, `all`

is a natural
extension of the logical AND operator.

If

`A`

is a vector, then`all(A)`

returns logical`1`

(`true`

) if all the elements are nonzero and returns logical`0`

(`false`

) if one or more elements are zero.If

`A`

is a nonempty matrix, then`all(A)`

treats the columns of`A`

as vectors and returns a row vector of logical`1`

s and`0`

s.If

`A`

is an empty 0-by-0 matrix, then`all(A)`

returns logical`1`

(`true`

).If

`A`

is a multidimensional array, then`all(A)`

acts along the first array dimension whose size does not equal 1 and returns an array of logical values. The size of this dimension becomes`1`

, while the sizes of all other dimensions remain the same.

## Examples

## Input Arguments

## Output Arguments

## Extended Capabilities

## Version History

**Introduced before R2006a**