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For loop

 
Greenhorn
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This is straight from the Kathy Sierra book about for loop
Keep in mind that this iteration expression is always the last thing that happens ! So although the body may never execute again, the iteration expression always runs at the end of the loop block. so for a for loop like this does it mean that when i is equal to 5 the body does not execute but still i is incremented ? but the output is 5. So is this a printing mistake or there is something else that the author wants to bring attention to.
 
Ranch Hand
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Hi Pujari,




does it mean that when i is equal to 5 the body does not execute but still i is incremented ? but the output is 5. So is this a printing mistake or there is something else that the author wants to bring attention to.

It never means that "when i is equal to 5 the body does not execute but still i is incremented"

1- Declaration and Inilialization/Initialization takes place once.
2- Condition is checked/ if false exit from the loop
3- Body of the loop is executed
4- Increment/decrement or say the third part of the loop executes, there can be print statement like things too.

Goto step 2


Thanks and Regards,
cmbhatt
 
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Hi Rohan,

Adding to Chandra,

Consider small example

boolean volatile No_Reply[] = {true , true, true, true};
String[] bartenders = { "Bert Bates", "Henry Wong", "Barry Gaunt","Marc Weber" };

for (byte i=0; i < bartenders.length ; i++){

synchronize(bartenders[i]){
if(No_Reply[i]){
S.o.p("I am longing for you: "+ bartenders[i]);
bartenders[i].wait(10000);
if ( i == bartenders.length -1) i = -1;
// Concentrate Here
// Here you need to take care you want i be inited with 0
// but here you can't put i=0; because next i++ executes,
// thus i becomes 1 and 1 < bartenders.length evaluates.

}
}

Thats the intent of warning given in your post.
 
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Originally posted by Roohan Pujari:
This is straight from the Kathy Sierra book about for loop
Keep in mind that this iteration expression is always the last thing that happens ! So although the body may never execute again, the iteration expression always runs at the end of the loop block. so for a for loop like this does it mean that when i is equal to 5 the body does not execute but still i is incremented ? but the output is 5. So is this a printing mistake or there is something else that the author wants to bring attention to.



It helps to understand what's happening if you rewrite the for loop as a while loop.



is equivalent to

 
Greenhorn
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please check the programe again...It is something like this
1. int i=0;
2. for(i=0;i<5;i++)
3. {
4. System.out.println(i);
5. }
System.out.println(i);

SO here when the for loop will exit , the value of i wud be "5" bcoz when the value of i was 4 thn the conditional statement was true and so i got incrimented by 1.

So kindly check the question again
 
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