(string-capitalize! str)

string-capitalize! converts the first letter of every word in the original string to an uppercase. Non first letters will be converted to lower case. This one replaces the original string too!

Parameter	Description
str	Input string

Example

Example 1: Show the usage of string-capitalize!, which replaces the original string too

> (define mystr "hello you. Hello hELLO")
> mystr
> (string-capitalize! mystr)
"Hello You. Hello Hello"
> mystr
"Hello You. Hello Hello"