docs-v2/content/v2.0/reference/flux/stdlib/strings/toupper.md

title	description	aliases	menu	weight	related
strings.toUpper() function	The strings.toUpper() function converts a string to uppercase.	/v2.0/reference/flux/functions/strings/toupper/	v2_0_ref name parent strings.toUpper Strings	301	/v2.0/reference/flux/stdlib/strings/totitle /v2.0/reference/flux/stdlib/strings/tolower /v2.0/reference/flux/stdlib/strings/title

The strings.toUpper() function converts a string to uppercase.

Output data type: String

import "strings"

strings.toUpper(v: "koala")

// returns "KOALA"

Parameters

v

The string value to convert.

Data type: String

Examples

Convert all values of a column to upper case

import "strings"

data
  |> map(fn: (r) => ({ r with envVars: strings.toUpper(v: r.envVars) }))

{{% note %}}

The difference between toTitle and toUpper

The results of toUpper() and toTitle are often the same, however the difference is visible when using special characters:

str = "dz"

strings.toUpper(v: str) // Returns DZ
strings.toTitle(v: str) // Returns Dz

{{% /note %}}