Shell Programming and Scripting

#!/bin/sh
inc() {
local value=4
echo "value is $value within the function\\n"
echo "\\b\$1 is $1 within the function"
}
value=5
echo value is $value before the function
echo "\$1 is $1 before the function"
echo
echo -e $(inc $value)
echo
echo value is $value after the function
echo "\$1 is $1 after the function"

-e value is 4 within the function$1 is 5 within the function

value is 4 within the function
$1 is 5 within the function

#!/bin/sh
inc() {
local value=4
echo "value is $value within the function"
printf '$1 is %s within the function\n' "$1"
}
value=5
echo value is $value before the function
printf '$1 is %s before the function\n' "$1"
printf '\n%s\n\n' "$(inc $value)"
echo value is $value after the function
printf '$1 is %s after the function\n' "$1"

echo "\\b\$1"