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  Enhance Readability

Use Indentation Parentheses, Blank Spaces, blank Lines and Borders around Comment Blocks to Enhance Readability

How the program is organized and presented can  have great effect  on the  readability  of it. It  is relatively simple to make a program easy to  read. Consistent use of indentation, blank spaces blank lines and parentheses should be used to enhance the readability.

Indentation is  perhaps the most  important  technique  for increasing readability. In  java indentation can be used to connect  corresponding (....) pairs. It also  shows  which  belong in a given block. In  fact correct indentation is too  important to be left  to human beings. Even CASE tolls can also be used to ensure that indentation is done correctly.

Next useful  aid is blank lines. Methods should  be separated by  blank line. In  nontrivial compilation units it is often  helpful  to break up large blocks of code with blank lines. The extra white space makes the code easier to read and hence comprehend. Another aspect is of the parentheses which should also be given good concentration. Mismatch parentheses, and missing parentheses, incorrect use of  parentheses may  lead to inappropriate program. So a pleasing format enhances the readability of a program.

Example 52. Consider the following java code shown  in  fig 6.26, which  is so badly written.

If this program is written in good  source code format  then it will look like as  shown  in fig 6.27,

As shown  in fig 6.27. the indentation  blank spaces and parentheses ( begin and end of  loop) are used properly and appropriately. So it is very difficult to  read  the code if these features are not used properly.

Sometimes such  formatting  of source text is done  manually by the programming and sometimes by  an automated tools. An automated tool i.e. pretty print routine automatically  indents code to emphasize that syntactic  structure  of the programming  language. A formatting routine can also  inset blank  lines and borders around comment  statements.

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