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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