Name: strcase

Syntax:
(strcase str [flag])

Description:
Converts the string into all uppercase letters when no flag is used or all lowercase letters when a flag is provided. A flag is something that always as a value. T always equals T, and that's why T is often used as a flag.

Example(s):
(strcase "Hello World!")
"HELLO WORLD!"

(strcase "Hello World!" T)
"hello world!"