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# Function and
Logical `and`. Test whether two values are both defined with a nonzero/nonempty value.
For matrices, the function is evaluated element wise.
## Syntax
```js
math.and(x, y)
```
### Parameters
Parameter | Type | Description
--------- | ---- | -----------
`x` | number | BigNumber | Complex | Unit | Array | Matrix | First value to check
`y` | number | BigNumber | Complex | Unit | Array | Matrix | Second value to check
### Returns
Type | Description
---- | -----------
boolean | Array | Matrix | Returns true when both inputs are defined with a nonzero/nonempty value.
## Examples
```js
math.and(2, 4) // returns true
a = [2, 0, 0]
b = [3, 7, 0]
c = 0
math.and(a, b) // returns [true, false, false]
math.and(a, c) // returns [false, false, false]
```
## See also
[not](not.md),
[or](or.md),
[xor](xor.md)