Nesting Statement
            --Nesting is concept where a condition is inside in another condition
            --In nesting if all conditions true then the statement is execute
Complex Condition
             --Complex condition is sometimes more interactive instead of nested code
             --it is more simple and testable instead of nested code
Switch Statement
             --is useful to avoid multiple if statement
             --break is used after every case statement to avoid continuous loop
             --default is used to provide additional message in case if any cases doesn't match
             --break is not necessary to use after default and it is also good practice to never use break after default
For Loop
             --Saves our time
             --it is useful to print a text repeatedly