the movie length exercise is done

Author: HadiVahidi20

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -12,14 +12,59 @@ console.log(result);
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
+/*there are six variable declarations in this program:
+1. movieLength
+2. remainingSeconds
+3. totalMinutes
+4. remainingMinutes
+5. totalHours
+6. result
+*/
 
 // b) How many function calls are there?
 
+        /*There are no function calls in this code. Everything here is using operators and expressions, not calling functions.*/
+
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
 
+        /*The % operator in JavaScript is the remainder operator. It divides the left-hand number by the right-hand number and returns the remainder.
+
+        So in this case:
+
+        movieLength % 60
+
+        divides movieLength (8784) by 60 and gives the remaining seconds, which is 24.*/
+
+
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
 
+        /*The expression
+
+        totalMinutes = (movieLength - remainingSeconds) / 60;
+
+        subtracts the leftover seconds from the total seconds so that we get a whole number of minutes. 
+        Then it divides by 60 to convert seconds into minutes without any decimal part.*/
+
+
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+        /*The variable result represents the length of the movie in the format hours:minutes:seconds.
+
+        A better name could be something like:
+
+        movieDurationFormatted
+
+        formattedDuration
+
+        movieLengthHMS (HMS = hours, minutes, seconds)*/
+
+// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer,
+        /*Yes, it works for all non-negative values:
+
+        If the movie is less than an hour, totalHours is 0, so we get 0:MM:SS.
+
+        If the movie is less than a minute, both totalHours and remainingMinutes are 0, so we get 0:0:SS.
+
+        For larger movies, it correctly calculates hours, minutes, and seconds.
 
-// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+        The only exception would be negative values, which aren’t realistic for a movie length.*/