figure visualising the data structure we are operating on value word lef right table column for each variable we wish to track the ispalindrome algorithm uses the following list of variables in some form throughout its execution value word lef right having identified the values of the variables we need to keep track of we simply create column for each in table as shown in table nowusing the ispalindrome algorithm execute each statement updating the variable values in the table appropriately table shows the final table values for each variable used in ispalindrome respectively while this approach may look little bloated in printon paper it is much more compact where we have the strings in the table you should annotate these strings with array indexes to aid the algorithm walkthrough there is one other point that we should clarify at this time whether to include variables that change only few timesor not at all in the trace table in table we have included both the valueand word variables because it was convenient to do so you may find that you want to promote these values to larger diagram (like that in figure and only use the trace table for variables whose values change during the algorithm we recommend that you promote the core data structure being operated on to larger diagram outside of the table so that you can interrogate it more easily value "never odd or evenword "neveroddorevenlef table algorithm trace for ispalindrome right