Shell script to convert to Title case

UNIX for Advanced & Expert Users
1

I need a shell script which will convert the given string to Title case.

E.g "hi man"

to "Hi man"

2 
$ echo "hi man" | perl -ane ' foreach $wrd ( @F ) { print ucfirst($wrd)." "; } print "\n" ; '
Hi Man
3

this is good but pls tell the logic in perl part.

also can it be done purely in shell script (+ awk, sed like tat) without any help from other languages like perl, python, etc?

4

I have a 2 step process:

a=`echo hi man | cut -c1 | tr [:lower:] [:upper:]`
echo hi man | sed "s/./$a/"

5 
echo "hi man" | perl -ane ' foreach $wrd ( @F ) { print ucfirst($wrd)." "; } print "\n" ; '

a option splits the input with space as separator and assign the splitted words in array F.
Loop through the array and ucfirst function capitalizes the first character of the word

6 
echo "hi man" | awk '{printf("%s%s\n",toupper(substr($0,1,1)),substr($0,2))}'