# tensorplay.functional.sign

Source: https://www.tensorplay.cn/docs/generated/tensorplay.functional.sign.html

```python
tensorplay.functional.sign(input, *, out=None) → Tensor
```

Returns a new tensor with the signs of the elements of input.

$$\text{out}_{i} = \operatorname{sgn}(\text{input}_{i})$$

Parameters:

input ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor)) – the input tensor.

Keyword Arguments:

out ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor), optional) – the output tensor.

Example:

```
>>> a = tensorplay.tensor([0.7, -1.2, 0., 2.3])
>>> a
tensor([ 0.7000, -1.2000,  0.0000,  2.3000])
>>> tensorplay.sign(a)
tensor([ 1., -1.,  0.,  1.])
```