1+ // Step By Step
2+
3+ function DivisionStringified ( num1 , num2 ) {
4+ // First, we use the Math.round method to calculate our product...
5+ // ...and then use the .toString method to convert the reusltant number into a string.
6+ var result = Math . round ( num1 / num2 ) . toString ( ) ;
7+
8+ // Next, we use the .split method to convert our result variable into an array so it can be further manipulated.
9+ // Note that we pass in an empty string ("") into the .split method to split the result variable at every character.
10+ var resultArr = result . split ( '' ) ;
11+
12+ // Next, we check if our result is greater than 1000.
13+ if ( result >= 1000 ) {
14+ // If it is, we loop through each item in our result array...
15+ // ...starting at the third character from the end (i = result.length - 3)...
16+ // ...moving back three charactres each time (i -= 3)...
17+ // ...and stopping when we get to the start of the string (i > 0)
18+ for ( var i = result . length - 3 ; i > 0 ; i -= 3 ) {
19+ // At every third character we use the .splice method to insert a comma.
20+ // Note that the first arguement of the .splice is where the method inserts things into the array (i),
21+ // ...the second controls how many array items are removed (0),
22+ // ...and the third controls what is inserted (",").
23+ resultArr . splice ( i , 0 , ',' ) ;
24+ }
25+ }
26+
27+ // Finally, we return our result array with the .join method to covert it into a string.
28+ return resultArr . join ( '' ) ;
29+ }
30+
31+ // No Comments
32+ function DivisionStringified ( num1 , num2 ) {
33+ var result = Math . round ( num1 / num2 ) . toString ( ) ;
34+ var resultArr = result . split ( '' ) ;
35+
36+ if ( result >= 1000 ) {
37+ for ( var i = result . length - 3 ; i > 0 ; i -= 3 ) {
38+ resultArr . splice ( i , 0 , ',' ) ;
39+ }
40+ }
41+
42+ return resultArr . join ( '' ) ;
43+ }
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