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

title	description	menu	weight	related
strings.isLower() function	The strings.isLower() function tests if a single-character string is lowercase.	v2_0_ref name parent strings.isLower Strings	301	/v2.0/reference/flux/functions/strings/isupper

The strings.isLower() function tests if a single-character string is lowercase.

Output data type: Boolean

import "strings"

strings.isLower(v: "a")

// returns true

Parameters

v

The single-character string value to test.

Data type: String

Examples

Filter by columns with single-letter lowercase values

import "strings"

data
  |> filter(fn: (r) => strings.isLower(v: r.host))