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NightShade01 · Nov 5th, 2006, 7:40 PM

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 :

(Toggle Plain Text)

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

(Toggle Plain Text)

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

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

Nov 5th, 2006, 7:40 PM	#1
NightShade01 Programmer Join Date: Oct 2005 Posts: 52 Rep Power: 3	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.

Nov 5th, 2006, 7:42 PM	#2
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Only if you don't want to execute the next case. That's most of the time. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Nov 5th, 2006, 11:23 PM	#3
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 381 Rep Power: 4	And a short example : (Toggle Plain Text) 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; } 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; } __________________ Don't take life too seriously, it's not permanent !

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Jan 11th, 2007, 2:40 AM	#6
Mixmaster Newbie Join Date: Sep 2006 Posts: 8 Rep Power: 0	I thought you had to use break all the time as well. Im glad you asked that

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