SueMsOl · SueMsOl · Nov 1, 2024 · Oct 25, 2024
diff --git a/Sprint-1/explore/chrome.md b/Sprint-1/explore/chrome.md
@@ -10,9 +10,9 @@ Let's try an example.
 In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
 
-What effect does calling the `alert` function have?
+What effect does calling the `alert` function have? I get a pop-up window which prints my message.
 
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
 
-What effect does calling the `prompt` function have?
-What is the return value of `prompt`?
+What effect does calling the `prompt` function have? I get a pop-up notification asking the question and providing a box to get the input.
+What is the return value of `prompt`? it outputs the input of that question.
diff --git a/Sprint-1/explore/objects.md b/Sprint-1/explore/objects.md
@@ -4,13 +4,21 @@ In this activity, we'll explore some additional concepts that you'll encounter i
 
 Open the Chrome devtools Console, type in `console.log` and then hit enter
 
-What output do you get?
+What output do you get? 
+ƒ log() { [native code] } 
+(log is a function (that's what the ƒ symbol means).
+It's a "native" function, meaning it's built into the browser's JavaScript engine)
 
-Now enter just `console` in the Console, what output do you get back?
+Now enter just `console` in the Console, what output do you get back? 
+console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
+console is an object.
+It contains multiple functions (methods) like debug, error, info, log, warn, etc.
 
 Try also entering `typeof console`
+it returns object because console is an object.
 
 Answer the following questions:
 
-What does `console` store?
-What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+What does `console` store? methods. console is a toolbox full of different tools.
+What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean? 
+The dot tells JavaScript "look inside this object (console) and give me access to this specific method (log or assert)"
diff --git a/Sprint-1/interpret/percentage-change.js b/Sprint-1/interpret/percentage-change.js
@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,17 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
+/*Line 4: Number() replaceAll() | line 5: Number() replaceAll() | line 10: console.log() */
 
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
+/*Line 4; lack of comma between "," and ""; add a comma between them. */
 
 // c) Identify all the lines that are variable reassignment statements
+/*Line 4, line 5 */
 
 // d) Identify all the lines that are variable declarations
+/*Line 1, line 2, line 7, line 8 */
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+/*firstly, replaceAll string function gets executed. it replaces , in the carPrice variable's value with "". secondly, Number function changes 
+carPrice's data type from string to numeric. */
diff --git a/Sprint-1/interpret/time-format.js b/Sprint-1/interpret/time-format.js
@@ -11,14 +11,31 @@ 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?
+// a) How many variable declarations are there in this program? 6
 
-// b) How many function calls are there?
+// b) How many function calls are there? 1
 
 // c) Using documentation, explain what the expression movieLength % 60 represents
+/*it means dividing 8784 by 60 and output the remainder value of this division. */
+
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+/*It calculates the movie length in minutes */
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+/*it shows how long the movie is in hour/minute/seconds format like 2:34:44 . A better name is: totalMovieLength */
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+
+/*an easier code would be:
+const movieLength = 8784;
+const totalMovieLength = `${Math.floor(movieLength / 3600)}:${Math.floor((movieLength % 3600) / 60)}:${(movieLength%3600) % 60}`;
+
+Or 
+const movieLength = 8784;
+const hour = Math.floor(movieLength/3600);
+const minute = Math.floor((movieLength%3600)/60);
+const second = (movieLength%3600)%60;
+console.log(`movie length is ${hour}:${minute}:${second}`);
+*/
+
diff --git a/Sprint-1/interpret/to-pounds.js b/Sprint-1/interpret/to-pounds.js
@@ -1,19 +1,21 @@
-const penceString = "399p";
-
-const penceStringWithoutTrailingP = penceString.substring(
+// variable declaration; assignment of value 399p to penceString variable
+const penceString = "399p"; 
+// variable declaration; the expression takes the p out of penceString and outputs 399
+const penceStringWithoutTrailingP = penceString.substring( 
   0,
   penceString.length - 1
 );
-
+//variable declaration; the expression adds 0 to the start of the penceStringWithoutTrailingP if it has less than 3 characters
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//variable declaration; the expression takes out 99 from paddedPenceNumberString and outputs 3
 const pounds = paddedPenceNumberString.substring(
   0,
   paddedPenceNumberString.length - 2
 );
-
+//variable declaration; the expression takes out 3 from paddedPenceNumberString, then adds 0 to the end of if its characters are less than 2
 const pence = paddedPenceNumberString
   .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
+  .padEnd(2, "0"); //output:99
 
 console.log(`£${pounds}.${pence}`);