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### `tf.sigmoid(x, name=None)` {#sigmoid}
Computes sigmoid of `x` element-wise.
Specifically, `y = 1 / (1 + exp(-x))`.
##### Args:
* <b>`x`</b>: A Tensor with type `float`, `double`, `int32`, `complex64`, `int64`,
or `qint32`.
* <b>`name`</b>: A name for the operation (optional).
##### Returns:
A Tensor with the same type as `x` if `x.dtype != qint32`
otherwise the return type is `quint8`.
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