Setting variables in ksh

typeset -l	lower case
typeset -u	upper case
typeset -r	read only variable (read only variable cannot be unset)
typeset -i	variable of type integer (faster execution, ksh checks the validity of value)
integer		the same as typeset -i
typeset -Ln	left justified (set field width to n)
typeset -LZn	left justified, set field width to n and strip leading zeros
typeset -Rn	right justified (set field width to n)
typeset -RZn	right justified, set field width to n and fill with leading zeros
typeset -t	set the user defined attributes for a variable
typeset -x	automatically export variable (like export)
typeset +i	remove the integer type (or any other type exept -r read only)