# 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)