Switching Branches

Switch Statements

    

          Conditional branching performed by multiple if-elseif-else statement can often be performed more efficient by a switch statement when the test expression just evaluates one condition .

The switch statement work in an unusual way . It takes a given value as its parameters argument  then seeks to match that value from a number of case statement .

The important to end each case statement with a break keyword statement so the switch statement when then exit when a match is found without seeking further matches 

Syntax

     switch(test-value)

        {

           case match-value:statement-to-execute-when-matched ; break;

           case match-value:statement-to-execute-when-matched ; break;

           case match-value:statement-to-execute-when-matched ; break;

           default : statement-to-execute-when-no-match-found ;

        }

PHP Program

<?php

    $number=2;

    $letter=B;

               // First Condition

    switch($number)

       {

           case 1 : echo 'number is one ';break;

           case 2 : echo 'number is two ';break;

           case 3 : echo 'number is three ';break;

           default : echo 'number is not unrecognized';

       }

            // Second Condition

        switch($letter)

          {

              case A : echo 'Letter is A ';break;

              case B : echo 'Letter is B ';break;

              case C : echo 'Letter is C ';break;

              default : echo 'Letter is Unrecognized ';

          }

?>

Output