docs-v2/content/v2.0/reference/flux/functions/strings/strlen.md

title	description	menu	weight
strings.strlen() function	The strings.strlen() function returns the length of a string. String length is determined by the number of UTF code points a string contains.	v2_0_ref name parent strings.strlen Strings	301

The strings.strlen() function returns the length of a string. String length is determined by the number of UTF code points a string contains.

Output data type: Integer

import "strings"

strings.strlen(v: "apple")

// returns 5

Parameters

v

The string value to measure.

Data type: String

Examples

Filter based on string value length

import "strings"

data
  |> filter(fn: (r) => strings.strlen(v: r._measurement) <= 4)

Store the length of string values

import "strings"

data
  |> map(fn: (r) => ({
      r with
      length: strings.strlen(v: r._value)
    })
  )