|---| | [ View source on GitHub](https://github.com/tensorflow/tensorflow/blob/v2.21.0/tensorflow/python/ops/string_ops.py#L412-L416) | String lengths of `input`. tf.strings.length( input, unit='BYTE', name=None ) ### Used in the notebooks | Used in the guide | Used in the tutorials | |---|---| | - [Unicode strings](https://www.tensorflow.org/text/guide/unicode) | - [Scalable model compression](https://www.tensorflow.org/tutorials/optimization/compression) - [word2vec](https://www.tensorflow.org/text/tutorials/word2vec) | Computes the length of each string given in the input tensor. strings = tf.constant(['Hello','TensorFlow', '\U0001F642']) tf.strings.length(strings).numpy() # default counts bytes array([ 5, 10, 4], dtype=int32) tf.strings.length(strings, unit="UTF8_CHAR").numpy() array([ 5, 10, 1], dtype=int32)


| ## Args || |---|---| | `input` | A `Tensor` of type `string`. The strings for which to compute the length for each element. | | `unit` | An optional `string` from: `"BYTE", "UTF8_CHAR"`. Defaults to `"BYTE"`. The unit that is counted to compute string length. One of: `"BYTE"` (for the number of bytes in each string) or `"UTF8_CHAR"` (for the number of UTF-8 encoded Unicode code points in each string). Results are undefined if `unit=UTF8_CHAR` and the `input` strings do not contain structurally valid UTF-8. | | `name` | A name for the operation (optional). |



| ## Returns || |---|---| | A `Tensor` of type `int32`. ||