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Nov 16th, 2007

test condition in a for loop

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I have a question regarding the test condition of the for loop..

For example, if the loop is say:

Java Syntax (Toggle Plain Text)
for ( int i=0 ; ( C1 && C2 ) ; i++ ) {// some code}
for ( int i=0 ; ( C1 && C2 ) ; i++ ) {// some code}

My question is, if either C1 or C2 is false then the test condition is false. So does the for loop end in this condition?

But what if in this particular iteration C1 is false, but in the next iteration both C1 and C2 will be true and now we want to execute the loop body.. How is it possible then if the loop ends as C1 is false before we get this scenario?

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kartik14

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Nov 16th, 2007

Re: test condition in a for loop

Don't put conditions in for loops... Personally, I don't like how they read. It can be non-intuitive sometimes.

Last edited by iamthwee; Nov 16th, 2007 at 9:39 am.

iamthwee

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Nov 16th, 2007

Re: test condition in a for loop

Click to Expand / Collapse Quote originally posted by iamthwee ...

Don't put conditions in for loops...

Nothing wrong with it. However, you must be aware that if the overall condition returns false, the loop ends. If you wish to skip a single iteration of the loop and continue with the next, then use only the standard condition (i.e. i < whatever) and add an if statement inside the loop for the other conditions. If that if statement returns true, then use the continue keyword. E.G.

Java Syntax (Toggle Plain Text)
for (int i = 0; i < someNumber; i++) {
  // maybe perform some partial loop actions
  if (someCondition) {
    continue;
  }
  // perform loop action
}
for (int i = 0; i < someNumber; i++) {
  // maybe perform some partial loop actions
  if (someCondition) {
    continue;
  }
  // perform loop action
}

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