Enhance comments for clarity and correctness on answers

Author: mervereis

Sprint-1/1-key-exercises/4-random.js

@@ -9,8 +9,9 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
 
 //Breakdown
-// Math.random() generates a random decimal number between 0 (inclusive) and 1 (exclusive).
+// Math.random() generates a random decimal number in the interval (0, 1).
 // (maximum - minimum + 1) calculates the range of numbers which is 100 - 1 + 1 = 100.
-// Multiplying Math.random() by (maximum - minimum + 1) scales the random decimal to a range of 0 (inclusive) to 100 (exclusive).
-// The Math.floor() rounds down the number to the nearest whole number, giving us an integer between 0 and 99.
-// Adding minimum (which is 1) shifts the range from 0-99 to 1-100.
+// Multiplying Math.random() by (maximum - minimum + 1) scales the random decimal to the interval [0, 100).
+// The Math.floor() rounds down the number to the nearest whole number, giving us an integer in [0, 99].
+// Adding minimum (which is 1) shifts the interval from [0, 99] to [1, 100].
+// Therefore, num is a random integer in the interval [1, 100].

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -27,9 +27,9 @@ priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
 // Line 5: replaceAll(",", "") and Number()
 // Line 9: console.log()
 
-// b) The error is coming from line 4 and line 5.
-//  The error occurs because the replaceAll method is being called on a string that contains a comma, which is not a valid number.
-//  To fix this problem, we can remove the commas from the strings before converting them to numbers. 
+// b) The error is coming from line 4 and line 5.  
+// The error occurred because a comma was missing between the arguments while redefining priceAfterOneYear variable at line 4 and 24.(",", "")
+//  To fix this problem, we need to put comma between the arguments or we can remove the commas from the strings before converting them to numbers. 
 
 // c) The variable reassignment statements are on line 4 and line 5, where carPrice and 
 // priceAfterOneYear are being reassigned to the result of the Number() function.

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -11,9 +11,9 @@ const pounds = paddedPenceNumberString.substring(
   paddedPenceNumberString.length - 2
 );
 
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
+const pence = paddedPenceNumberString.substring(
+  paddedPenceNumberString.length - 2
+);
 
 console.log(`£${pounds}.${pence}`);
 
@@ -23,7 +23,6 @@ console.log(`£${pounds}.${pence}`);
 // You need to do a step-by-step breakdown of each line in this program
 // Try and describe the purpose / rationale behind each step
 
-
 //1. const penceString = "399p": initializes a string variable with the value "399p"
 
 // 2 to 6.const penceStringWithoutTrailingP = penceString.substring(0,penceString.length - 1);
@@ -35,6 +34,13 @@ console.log(`£${pounds}.${pence}`);
 // 9.const pounds = paddedPenceNumberString.substring( 0, paddedPenceNumberString.length - 2);
 //     gets the ammout of pounds by making a sub string that starts at the firts character (0) to the paddedPenceNumberString length -2 to exclued the last 2 characters (the p)
 
-// 10.
+// 10.const pence = paddedPenceNumberString .substring(paddedPenceNumberString.length - 2);
+// Gets the amount of pence by making a substring that starts at the paddedPenceNumberString length -2 to get the last 2 characters
+
 // 18.console.log(`£${pounds}.${pence}`);
 //      gives the console the result using a string literal
+//console.log(`£${pounds}.${pence}`); :
+
+// Combines the pounds and pence into a standard currency format and prints it to the console, "£3.99"
+// The program takes a string representing a price in pence (e.g., "399p")
+// and converts it to a string representing the price in pounds (e.g., "£3.99").

Sprint-1/4-stretch-explore/objects.md

@@ -20,4 +20,4 @@ Try also entering `typeof console`'object'
 Answer the following questions:What does `console` store?the console stores objects
 What does the syntax `console.log` or `console.assert` mean?
 In particular, what does the `.` mean?
-the . denotes what kind of object the console is being told to use and what to do with the data it has been given
+the . denotes what kind of object the console is being told to use and what to do with the data it has been given , the . operator called dot operator or property access operator and it is used to access properties or methods of an object.