Tutorial by Examples

var="hello" function foo(){ echo $var } foo Will obviously output "hello", but this works the other way around too: function foo() { var="hello" } foo echo $var Will also output "hello"

function foo() { local var var="hello" } foo echo $var Will output nothing, as var is a variable local to the function foo, and its value is not visible from outside of it.

var="hello" function foo(){ local var="sup?" echo "inside function, var=$var" } foo echo "outside function, var=$var" Will output inside function, var=sup? outside function, var=hello