# tf.math.sign

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| [![](https://www.tensorflow.org/images/tf_logo_32px.png) TensorFlow 1 version](https://www.tensorflow.org/versions/r1.15/api_docs/python/tf/math/sign) |

Returns an element-wise indication of the sign of a number.

#### View aliases


**Main aliases**

[`tf.sign`](https://www.tensorflow.org/api_docs/python/tf/math/sign)
**Compat aliases for migration**

See
[Migration guide](https://www.tensorflow.org/guide/migrate) for
more details.

[`tf.compat.v1.math.sign`](https://www.tensorflow.org/api_docs/python/tf/math/sign), [`tf.compat.v1.sign`](https://www.tensorflow.org/api_docs/python/tf/math/sign)

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    tf.math.sign(
        x, name=None
    )

`y = sign(x) = -1` if `x < 0`; 0 if `x == 0`; 1 if `x > 0`.

For complex numbers, `y = sign(x) = x / |x|` if `x != 0`, otherwise `y = 0`.

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| ## Args ||
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| `x` | A `Tensor`. Must be one of the following types: `bfloat16`, `half`, `float32`, `float64`, `int32`, `int64`, `complex64`, `complex128`. |
| `name` | A name for the operation (optional). |

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| ## Returns ||
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| A `Tensor`. Has the same type as `x`. <br /> If `x` is a `SparseTensor`, returns `SparseTensor(x.indices, tf.math.sign(x.values, ...), x.dense_shape)` ||

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