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See the recommended documentation of this function

# and

logical AND of the elements of an array

### Calling Sequence

```b=and(A)
b=and(A,'*')
b=and(A,'r')
b=and(A,1)
b=and(A,'c')
b=and(A,2)```

### Description

`and(A)` is the logical AND of elements of the boolean matrix `A`. `and(A)` returns `%T` ("true") if all entries of `A` are `%T`.

`and([])` returns `%T`.

`y=and(A,'r')` (or, equivalently, `y=and(A,1)`) is the row-wise AND. It returns in each entry of the row vector `y` the AND of the rows of `x` (The AND is performed on the row index : `y(j)= and(A(i,j),i=1,m)`).

`y=and(A,'c')` (or, equivalently, `y=and(A,2)`) is the column-wise AND. It returns in each entry of the column vector `y` the AND of the columns of `x` (The AND is performed on the column index: `y(i)= and(A(i,j),j=1,n)`).

### Examples

```A = [];
and(A)

A = %T(ones(1, 3));
and(A)

A = %F(ones(1, 3));
and(A)

A = %T(ones(1, 3));
and(A, '*')
and(A, 'c')
and(A, 2)
and(A, 'r')
and(A, 1)```

### See Also

• not — (~) logical not
• and operator (&) — logical AND operator
• or — logical OR of the elements of an array

### Comments

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