带有嵌套if的其他语句

Question

Am I correct in assuming that when the first if statement and nested if within the else statement both fail, I then go back up to the first for loop and increment i by 1?

So I can continue until j < totalCols fails even though neither the if or else statement are executing?

var rowCount = [];
for (var i = 0; i < totalRows; i++) {
   rowCount[i]="";
   spaceCount = 0;

   for (var j = 0; j < totalCols; j++) {
      if (puzzle[i][j] == "#") { // if this fails?
         spaceCount++;
         if (j == totalCols-1) rowCount[i] += spaceCount + "&nbsp;&nbsp;"; 
      } else {
         if (spaceCount > 0) { //and this fails?
            rowCount[i] += spaceCount + "&nbsp;&nbsp;";
            spaceCount = 0;
         } 
      }    
   }

}

Answer 1

No, if either of those if statements fails, you are still in the inner loop that is incrementing j . In order to get out of the inner loop you need to use the break statement.

Answer 2

Nope, you first finish looping through the second loop and thus increment the j.

    for (var j = 0; j < totalCols; j++) {

Only once you're done with that loop, do you go back to the 1st and increment the i.

Answer 3

If the if statement fails the nested if won't execute. It goes to the else block and the loop continues until the condition i < totalRows is met.

If the if statement passes and the nested if fails, the loop still continues until i < totalRows is met.

If both if statements passes the loop continues the condition until i < totalRows is met.

What I am saying in essence is the if statement in the nested loop has nothing to do with the outer loop.

Answer 4

You can use the break statement to achieve this behavior. edit: should have read the answers first.