#!/bin/bash# Pitfalls of variables in a subshell.outer_variable=outerechoecho "outer_variable = $outer_variable"echo(# Begin subshellecho "outer_variable inside subshell = $outer_variable"inner_variable=inner  # Setecho "inner_variable inside subshell = $inner_variable"outer_variable=inner  # Will value change globally?echo "outer_variable inside subshell = $outer_variable"# Will 'exporting' make a difference?#    export inner_variable#    export outer_variable# Try it and see.# End subshell)echoecho "inner_variable outside subshell = $inner_variable"  # Unset.echo "outer_variable outside subshell = $outer_variable"  # Unchanged.echoexit 0# What happens if you uncomment lines 19 and 20?# Does it make a difference?