Programming Forums - switch statement

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- - switch statement (http://www.programmingforums.org/showthread.php?t=11812)

NightShade01

Nov 5th, 2006 7:40 PM

switch statement

just a quick question about switch statements. is it true that you always have to use break; at the end of each case in a switch statement? Someone was trying to explain a way to me where you don't but every text book i've read says you must.

DaWei

Nov 5th, 2006 7:42 PM

Only if you don't want to execute the next case. That's most of the time.

xavier

Nov 5th, 2006 11:23 PM

And a short example :

int n ;



switch(n){

   case 0:

   case 1:

   case 2: System.out.println ( "the number is <= 2"); break;

   case 3:

   case 4:

   case 5: System.out.println ( "the number is >=3 and <= 5"); break; 

   default :  System.out.println ( "the number is grater than 5"); break;

}

crawforddavid2006

Nov 5th, 2006 11:31 PM

just to let you know xavier... that won't do anything since n is not defined :p

now if you did something like this

int n = 0;

while(n < 3)

{

switch(n)

{

    case 0: System.out.println("0"); break;

    case 1: System.out.println("1"); break;

    case 2: System.out.println("2"); break;

}

n++;

}

it would work

xavier

Nov 6th, 2006 1:39 AM

Quote:

Originally Posted by crawforddavid2006 (Post 118457)

just to let you know xavier... that won't do anything since n is not defined :p

Yeah, you'r right, but the focus was the switch statement. I guess he cuold try the code a few times and initialize n to different values. I'm sure he would have realized that :p

Mixmaster

Jan 11th, 2007 2:40 AM

I thought you had to use break all the time as well. Im glad you asked that

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