All questions answered

Author: zilinskyte

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

@@ -12,14 +12,29 @@ 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 6 variable declarations in this program on lines 1, 3, 4, 6, 7, 9.
 
 // b) How many function calls are there?
+// 1: console.log() on line 10.
 
 // c) Using documentation, explain what the expression movieLength % 60 represents
+// The remainder (%) operator returns the remainder left over when one operand (dividend) is divided by a second operand (divisor). 
+// It always takes the sign (+/-) of the dividend (the first number).
+// So the movie length in seconds is divided by 60 (the number of seconds in a minute).
+// The remainder is the number of seconds left over after all the full minutes have been accounted for.
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// It subtracts the remaining seconds from total movie length to get the total length in seconds that can be evenly divided by 60.
+// Then divides by 60 to convert the length from seconds to minutes.
+// So totalMinutes represents the total number of full 60-second minutes in the movie.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+// The variable result represents the total length of the movie in hours, minutes and seconds.
+// A better name for this variable could be movieDuration or movieFormattedLength.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// The code will work for all positive integer values of movieLength formatting to H:MM:SS
+// It will also work for 0, returning 0:0:0
+// It will incorrectly format negative numbers and very small number like < 60 seconds.
+// Single digit minutes and seconds will not be zero-padded to two digits e.g. String(remainingMinutes).padStart(2, "0")