variables.sh

function getname
{
    VAR1=SILVESTER
    VAR2=STALLONE
    echo "Inside the function."
    echo "VAR1 is $VAR1"
    echo "VAR2 is $VAR2"
}

VAR1=ARNOLD
VAR2=SHWARZENEGGER

echo "You are in the main script."
echo "Unlike C programs, variables inside a function have a global scope and are not cleared when functions stop running"
echo "Outside the function:"
echo "VAR1 is $VAR1"
echo "VAR2 is $VAR2"
echo "Called to getname"
getname
echo "Again outside the function"
echo "VAR1 is $VAR1"
echo "VAR2 is $VAR2"
echo "You can see that exists one only copy of VAR1 and VAR2, and these are shared between main shell and function subshell unless you declare it local inside the function."