go – How do I convert a string to a lower case representation?-ThrowExceptions

Exception or error:

How do I convert a string to a lower case representation?

I feel that there must be built-in function for it, but I just can’t find it.

I did find a ToLower in "unicode/letter", but it only works for one rune at a time.

How to solve:

Yes there is, check the strings package.

package main

import (

func main() {


If you happen to be too lazy to click through to the strings package, here’s example code:

strings.ToLower("Hello, WoRLd") // => "hello, world"

If you need to handle a Unicode Special Case like Azeri or Turkish, you can use ToLowerSpecial:

strings.ToLowerSpecial(unicode.TurkishCase, "Hello, WoRLd") // => "hello, world"

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