141.95|212.95|312.95|10.95|
Reformatting the code snippet and giving it line numbers;
1. var totals = [141.95, 212.95, 411, 10.95];
2. totals[2] = 312.95;
3. var totalsString = "";
4. for (var i = 0; i < totals.length; i++) {
5. totalsString += totals[i] + "|";
6. }
Line 1 creates an array called totals with four elements.
First element = totals[0] =141.95
Second element = totals[1] = 212.95
Third element = totals[2] = 411
Fourth element = totals[3] = 10.95
Line 2 replaces the value of the third element totals[2] = 411 with 312.95.
Therefore the array totals = [141.95, 212.95, 312.95, 10.95]
Line 3 creates an empty string called totalsString
Lines 4 - 6 create a for loop that cycles from i=0 to i<totals.length
totals.length = 4 (which is the number of items in the array totals)
This means that the loop cycles from i=0 to i<4
During cycle 1 when i = 0, the expression inside the for loop executes as follows;
totalsString = totalsString + totals[0] + "|" //substitute the values
totalsString = "" + 141.95 + "|"
totalsString = 141.95|
During cycle 2 when i = 1, the expression inside the for loop executes as follows;
totalsString = totalsString + totals[1] + "|" //substitute the values
totalsString = "141.95|" + 212.95 + "|"
totalsString = 141.95|212.95|
During cycle 3 when i = 2, the expression inside the for loop executes as follows;
totalsString = totalsString + totals[2] + "|" //substitute the values
totalsString = "141.95|212.95|" + 312.95 + "|"
totalsString = 141.95|212.95|312.95|
During cycle 4 when i = 3, the expression inside the for loop executes as follows;
totalsString = totalsString + totals[3] + "|" //substitute the values
totalsString = "141.95|212.95|312.95|" + 10.95 + "|"
totalsString = 141.95|212.95|312.95|10.95|
At the end of the execution, totalsString = 141.95|212.95|312.95|10.95|
