Task

Verify that a file called     input.txt     and   a directory called     docs     exist.



This should be done twice:  

   once for the current working directory,   and
   once for a file and a directory in the filesystem root.


Optional criteria (May 2015):   verify it works with:

   zero-length files
   an unusual filename:     `Abdu'l-Bahá.txt  


if { [file exists "input.txt"] } {
    puts "input.txt exists"
} 
 
if { [file exists [file nativename "/input.txt"]] } {
    puts "/input.txt exists"
} 
 
if { [file isdirectory "docs"] } {
    puts "docs exists and is a directory"
}
 
if { [file isdirectory [file nativename "/docs"]] } {
    puts "/docs exists and is a directory"
}