#!/bin/ksh
# Scriptname: do_increment
# Using the return Command)
function increment {
typeset sum # sum is a local variable.
(( sum = $1 + 1 ))
return $sum # Return the value of sum to the script.
}
print -n "The sum is "
increment 5 # Call the function increment and pass 5 as a
# parameter. 5 becomes $1 for the increment
# function.
print $? # The return value is stored in the ? variable
print $sum # The variable "sum" was local to the
# function, and is undefined in the main
# script. Nothing is printed.
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