#!/usr/bin/env bash

#-------------------------------------------------------------------------------
# Example 2 for Bash Tips show 21: the environment
#-------------------------------------------------------------------------------

BTversion='21'
export BTversion

echo "** Using 'grep' with 'env'"
env | grep -E '(EDITOR|SHELL|BTversion)='
echo

echo "** Using 'printenv' with arguments"
printenv EDITOR SHELL BTversion
echo

echo "** Using 'grep' with 'export'"
export | grep -E '(EDITOR|SHELL|BTversion)='
echo

echo "** Using 'grep' with 'declare'"
declare -x | grep -E '(EDITOR|SHELL|BTversion)='

exit