ML Community Day is November 9! Join us for updates from TensorFlow, JAX, and more Learn more

tf.strings.length

String lengths of input.

Used in the notebooks

Used in the guide Used in the tutorials

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)

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).

A Tensor of type int32.