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# 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 rowwise 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 columnwise 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)`)).

### See Also

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

### Comments

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