Range returning null using getRange

I am new to Google Apps Script and the docs are a little fuzzy on the returned data from a method call. I want to loop through a range, but it is coming back as null. What am I doing wrong?

var currentSheet = SpreadsheetApp.getActiveSheet();
var loopRng = currentSheet.getRange('B4:B34');
var counter = 0;

Logger.log(loopRng.length);

for(var i = 0; i < loopRng.length; i++) {
 counter++;
 Logger.log(counter);
}
}

Answers 1

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