Guidelines for using control structures(if/else if/Switch )

Important Note : program readability is most important after working software.

If statements :

• Write nominal path through the code first ;then write the unusual cases last
• Put the normal case after the if rather than the else
• Try to consider the else clause 

If else if Statements :

• Simplify the complicated condition checking with a function call
• Keep the most common case first
• Try to use switch/case statement instead of if else statements

Switch/Case statements :

• Order cases alphabetically or numerically
• Put the normal case first
• Put the most frequently executed case first and the least executed cases last
• Use default case for detecting legitimate defaults or errors