# Method countTrue

#### static member countTrue: Tensor<bool> -> int64

Counts the elements being true.

##### Declaration

`static member countTrue: src:Tensor<bool> -> int64`

##### Parameters

Type | Name | Description |
---|---|---|

Tensor<bool> | src | The tensor containing the source values. |

##### Returns

Type | Description |
---|---|

int64 | A scalar containing the result of this operation. |

##### Remarks

The number of elements that are true is counted and returned as a scalar.

##### Examples

```
let a = HostTensor.ofList2D [[true; false; true; false]
[false; true; true; false]]
let b = Tensor.countTrue a // b = 4L
```