Confusing ToUpper and ToTitle

Question

Is there any difference between the ToUpper and the ToTitle function?

Answer 1

For a truly title case converting function, you must use -

strings.Title(strings.ToLower(str))

I tried the answers for converting a string to title case and none of the following works in case of a word which already has all uppercase characters or text that has few letters in uppercase and few in lowercase.

Here's a comprehensive check on what does what - http://ideone.com/r7nVbZ

I'm pasting the results here -

Given Text:  title case
ToTitle:  TITLE CASE
ToUpper:  TITLE CASE
Title:  Title Case
ToLower then Title:  Title Case
-------------------------------

Given Text:  Title Case
ToTitle:  TITLE CASE
ToUpper:  TITLE CASE
Title:  Title Case
ToLower then Title:  Title Case
-------------------------------

Given Text:  TITLE CASE
ToTitle:  TITLE CASE
ToUpper:  TITLE CASE
Title:  TITLE CASE
ToLower then Title:  Title Case
-------------------------------

Given Text:  TiTlE CasE
ToTitle:  TITLE CASE
ToUpper:  TITLE CASE
Title:  TiTlE CasE
ToLower then Title:  Title Case
-------------------------------

Given Text:  Title case
ToTitle:  TITLE CASE
ToUpper:  TITLE CASE
Title:  Title Case
ToLower then Title:  Title Case
-------------------------------

Given Text:  title CASE
ToTitle:  TITLE CASE
ToUpper:  TITLE CASE
Title:  Title CASE
ToLower then Title:  Title Case