get value in one column in spreadsheet using google apps script

Question

I want to get a string value -to compare it later on with an if condition- from only one column in spreadsheet using Google apps script. I searched the internet and I found

Answer 1

much easier way to loop through the rows and get a column value.. hope that helps

var values = SpreadsheetApp.getActiveSheet().getDataRange().getValues();

values.forEach( function(row) {
  row[4] // column index as 4
});