getCurrentBarIndex syntax

[philtong]

What am I missing? Document says:

getCurrentBarIndex() – Returns the index of the bar currently being computed.
getNewestBarIndex([symbol]) – Returns the index of the most recent bar.

var nbi1;
var nbi2;
nbi1 == getCurrentBarIndex();
nbi2 == getNewestBarIndex();

both of these statments result in "undefined" variables when displaying for debug.
Can someone show me an example of how to correctly use these functions?
Thank you.

[dloomis]

doh!

function main(){

var nbi1;
var nbi2;
nbi1 = getCurrentBarIndex();
nbi2 = getNewestBarIndex();

debugPrintln(nbi1+" "+nbi2);
}