diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js
index 117bcb2b6..75f70a99c 100644
--- a/Sprint-1/1-key-exercises/1-count.js
+++ b/Sprint-1/1-key-exercises/1-count.js
@@ -4,3 +4,7 @@ count = count + 1;
// Line 1 is a variable declaration, creating the count variable with an initial value of 0
// Describe what line 3 is doing, in particular focus on what = is doing
+
+
+
+//line 3 is updating the value of count by adding 1 to its current value, so count now equals 1 and every time we run the code it will increment by 1.
diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
index 47561f617..ed47479dc 100644
--- a/Sprint-1/1-key-exercises/2-initials.js
+++ b/Sprint-1/1-key-exercises/2-initials.js
@@ -5,7 +5,9 @@ let lastName = "Johnson";
// Declare a variable called initials that stores the first character of each string.
// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
-let initials = ``;
+let initials = `${firstName.charAt(0)}${middleName.charAt(0)}${lastName.charAt(0)}`;
+
+console.log(initials);
// https://www.google.com/search?q=get+first+character+of+string+mdn
diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
index ab90ebb28..d91354a67 100644
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ b/Sprint-1/1-key-exercises/3-paths.js
@@ -17,7 +17,11 @@ console.log(`The base part of ${filePath} is ${base}`);
// Create a variable to store the dir part of the filePath variable
// Create a variable to store the ext part of the variable
-const dir = ;
-const ext = ;
+const dir = filePath.slice(0, lastSlashIndex);
+const ext = filePath.slice(filePath.lastIndexOf("."));
-// https://www.google.com/search?q=slice+mdn
\ No newline at end of file
+console.log(`The dir part of ${filePath} is ${dir}`);
+
+console.log(`The ext part of ${filePath} is ${ext}`);
+
+// https://www.google.com/search?q=slice+mdn
diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
index 292f83aab..818e19a65 100644
--- a/Sprint-1/1-key-exercises/4-random.js
+++ b/Sprint-1/1-key-exercises/4-random.js
@@ -5,5 +5,31 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
// In this exercise, you will need to work out what num represents?
// Try breaking down the expression and using documentation to explain what it means
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/floor
+//
+
+//Mach.random() - generates a random number between 0 (inclusive) and 1 (exclusive):
+const num1=Math.random();
+console.log(num1);
+
+const num3=(maximum - minimum + 1);
+//(maximum - minimum + 1) - calculates the range of numbers we want (in this case, 100 - 1 + 1 = 100)
+//so by adding this to our random number we are scaling it to be between 0 and 100
+console.log(num3);
+const num2=Math.random()*(maximum - minimum + 1);
+console.log(num2);
+//until this point we have a random number between 0 (inclusive) and 100 (exclusive)but is can be a decimal number
+// Math.floor() - rounds down to the nearest whole number, so we now have a random integer between 0 and 99
+
+const num5 = Math.floor(Math.random() * (maximum - minimum + 1)) ;
+console.log(`it suppose to be a rounded number from 0-99 ${num5}`);
+
+//finally By adding 1, the number will be between 1 and 100, including both.
+
+console.log(`it suppose to be a rounded number from 1-100 ${num}`);
+
// It will help to think about the order in which expressions are evaluated
// Try logging the value of num and running the program several times to build an idea of what the program is doing
+
diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js
index cf6c5039f..b585d56a6 100644
--- a/Sprint-1/2-mandatory-errors/0.js
+++ b/Sprint-1/2-mandatory-errors/0.js
@@ -1,2 +1,4 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
\ No newline at end of file
+/*This is just an instruction for the first activity - but it is just for human consumption
+We don't want the computer to run these 2 lines - how can we solve this problem?*/
+
+// we can use comments to ignore these lines of code, in javascript we use // for single line comments and /* */ for multi line comments
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
index 7a43cbea7..c7193acfc 100644
--- a/Sprint-1/2-mandatory-errors/1.js
+++ b/Sprint-1/2-mandatory-errors/1.js
@@ -1,4 +1,22 @@
// trying to create an age variable and then reassign the value by 1
+
+
const age = 33;
age = age + 1;
+console.log(age);
+/*the constant variable cannot be reassigned a new value
+so in lin 6 we will get an error because it can not reassign the age variable with a new value of age + 1 which in this case is 34
+here is the error message we will get:/home/cyf/CYF/ITP/Module-Structuring-and-Testing-Data/Sprint-1/2-mandatory-errors/1.js:6
+age = age + 1;
+ ^
+
+TypeError: Assignment to constant variable.
+
+ to fix this error we can use let instead of const because let variable can be reassigned a new value*/
+
+let age2 = 33;
+age2 = age2 + 1;
+console.log(age2);
+
+// now it will work fine and the output will be 34 and every time we run the code it will increase by 1
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js
index e09b89831..b186e8890 100644
--- a/Sprint-1/2-mandatory-errors/2.js
+++ b/Sprint-1/2-mandatory-errors/2.js
@@ -1,5 +1,17 @@
// Currently trying to print the string "I was born in Bolton" but it isn't working...
// what's the error ?
-console.log(`I was born in ${cityOfBirth}`);
+//console.log(`I was born in ${cityOfBirth}`);
const cityOfBirth = "Bolton";
+
+/*/home/cyf/CYF/ITP/Module-Structuring-and-Testing-Data/Sprint-1/2-mandatory-errors/2.js:4
+console.log(`I was born in ${cityOfBirth}`);
+ ^
+
+ReferenceError: Cannot access 'cityOfBirth' before initialization
+
+this error is because we are trying to access the variable cityOfBirth before it is initialized and assigned a value.
+ the console.log should be after the variable declaration and assignment
+
+*/
+console.log(`I was born in ${cityOfBirth}`);
diff --git a/Sprint-1/2-mandatory-errors/3.js b/Sprint-1/2-mandatory-errors/3.js
index ec101884d..9192fcd9a 100644
--- a/Sprint-1/2-mandatory-errors/3.js
+++ b/Sprint-1/2-mandatory-errors/3.js
@@ -1,9 +1,18 @@
const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(`The last 4 digits of my card number are ${last4Digits}`);
// The last4Digits variable should store the last 4 digits of cardNumber
// However, the code isn't working
// Before running the code, make and explain a prediction about why the code won't work
+
+
+
+//it doesn't work because the slice method is used for strings and arrays but cardNumber is a number so it doesn't have the slice method.
+
+
+
// Then run the code and see what error it gives.
// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
// Then try updating the expression last4Digits is assigned to, in order to get the correct value
+// to fix this error we can convert the number to a string using the toString() method before applying the slice method
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js
index 21dad8c5d..6666d4699 100644
--- a/Sprint-1/2-mandatory-errors/4.js
+++ b/Sprint-1/2-mandatory-errors/4.js
@@ -1,2 +1,7 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
\ No newline at end of file
+const twelveHourClockTime = "08:53";
+const twentyFourHourClockTime = "20:53";
+
+//tha variable names are cannot start with a number
+// so the variable name 12HourClockTime is not valid because it starts with a number
+// to fix this error we can change the variable name to twelveHourClockTime and as is not relevant to the time format
+// so we can swap the variable names.
\ No newline at end of file
diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
index e24ecb8e1..adcd0c99f 100644
--- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js
+++ b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
@@ -2,21 +2,63 @@ 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;
-console.log(`The percentage change is ${percentageChange}`);
+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
+/*There are 5 function calls in total: two in the line, and another on in console log
+
+carPrice = Number(carPrice.replaceAll(",", ""));
+
+and two in the line
+
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+
+In each line, one function is nested inside the other, so both lines contain two function calls each.*/
+
+
+
// 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?
+
+/*priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+ ^^^
+
+SyntaxError: missing ) after argument list
+the error is because a missing comma in the replaceAll method argument list
+*/
+
+
// c) Identify all the lines that are variable reassignment statements
+
+
+/*carPrice = Number(carPrice.replaceAll(",", ""));
+ priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+ these two lines are variable reassignment statements because we are reassigning a new value to the existing variables carPrice and priceAfterOneYear.*/
+
// d) Identify all the lines that are variable declarations
+
+/*let carPrice = "10,000";
+let priceAfterOneYear = "8,543";
+const priceDifference = carPrice - priceAfterOneYear;
+const percentageChange = (priceDifference / carPrice) * 100;
+
+these four lines are variable declaration statements because we are declaring new variables:
+carPrice, priceAfterOneYear, priceDifference and percentageChange using let and const keywords.*/
+
+
+
// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+
+/*first removes all commas from the string carPrice using replaceAll(",", ""), and then converts the resulting string into a number using Number().*/
\ No newline at end of file
diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js
index 47d239558..95c58a344 100644
--- a/Sprint-1/3-mandatory-interpret/2-time-format.js
+++ b/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 1 function calls in this code. in console.log(result);.*/
+
// 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.*/
\ No newline at end of file
diff --git a/Sprint-1/3-mandatory-interpret/3-to-pounds.js b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
index 60c9ace69..aa8399470 100644
--- a/Sprint-1/3-mandatory-interpret/3-to-pounds.js
+++ b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
@@ -1,27 +1,69 @@
-const penceString = "399p";
+const penceString = "3679p";
-const penceStringWithoutTrailingP = penceString.substring(
- 0,
- penceString.length - 1
-);
+const penceStringWithoutTrailingP = penceString.substring(0, penceString.length - 1);
+
+console.log(penceStringWithoutTrailingP);
const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
-const pounds = paddedPenceNumberString.substring(
- 0,
- paddedPenceNumberString.length - 2
-);
-const pence = paddedPenceNumberString
- .substring(paddedPenceNumberString.length - 2)
- .padEnd(2, "0");
+console.log(paddedPenceNumberString);
+
+const pounds = paddedPenceNumberString.substring( 0, paddedPenceNumberString.length - 2);
+
+console.log(pounds);
+
+const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+
+console.log(pence);
console.log(`£${pounds}.${pence}`);
+
+
// This program takes a string representing a price in pence
// The program then builds up a string representing the price in pounds
// You need to do a step-by-step breakdown of each line in this program
+
+
+
// Try and describe the purpose / rationale behind each step
// To begin, we can start with
// 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+/*1. const penceString = "399p";
+
+We create a variable called penceString and give it the value "399p".
+
+This is the price in pence, written as text.
+
+2. const penceStringWithoutTrailingP = penceString.substring(0, penceString.length - 1);
+
+We remove the last letter "p" from the string.
+
+Now we only have the numbers, for example "399".
+
+**3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+
+We make sure the string has at least 3 characters by adding zeros at the start if needed.
+
+Example: "50" becomes "050" and "5" becomes "005".
+
+4. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2);
+
+We take all characters except the last two.
+
+These characters are the pounds. Example: "399" → "3" pounds.
+
+5. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+
+We take the last two characters. These are the pence.
+
+We add a zero at the end if needed to always have two digits. Example: "5" → "05".
+
+6. console.log(£${pounds}.${pence});
+
+We show the price in pounds and pence.
+
+Example: "399p" → £3.99, "50p" → £0.50. */
diff --git a/Sprint-1/4-stretch-explore/objects.md b/Sprint-1/4-stretch-explore/objects.md
index 0216dee56..c79472101 100644
--- a/Sprint-1/4-stretch-explore/objects.md
+++ b/Sprint-1/4-stretch-explore/objects.md
@@ -6,11 +6,21 @@ Open the Chrome devtools Console, type in `console.log` and then hit enter
What output do you get?
+ƒ log() { [native code] }
+
Now enter just `console` in the Console, what output do you get back?
+console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
+
Try also entering `typeof console`
+'object'
Answer the following questions:
What does `console` store?
+
+console stores different functions (like log, assert, warn, error) that you can use to interact with the console.
+
+
What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+console.log("Hello") means: Look in the console object, find the log function, and run it with "Hello" as the argument.
diff --git a/Sprint-1/prep/example.js b/Sprint-1/prep/example.js
new file mode 100644
index 000000000..0cbaf5e5d
--- /dev/null
+++ b/Sprint-1/prep/example.js
@@ -0,0 +1,16 @@
+function to24hourtime(hour, minute, period) {
+ //if the period is pm then add 12 to hours.
+
+ if ((hour = "12") && (minute = "00")) {
+ return "0000";
+ }
+}
+
+//for hours and minute make sure they are in 3 digit.
+//return the hours and minute as a 4 char string.
+
+// hour will always range from 1 to 12 (inclusive)
+// minute will always range from 0 to 59 (inclusive)
+// period will always be either "am" or "pm"
+
+console.log(to24hourtime());
diff --git a/Sprint-1/prep/myAge.html b/Sprint-1/prep/myAge.html
new file mode 100644
index 000000000..888baa26e
--- /dev/null
+++ b/Sprint-1/prep/myAge.html
@@ -0,0 +1,101 @@
+
+
+
+
+
+
+
+ My Age
+
+
+
+
+
Welcome to Age Calculator
+
Please enter your year of birth:
+
+
+
Your Age is:
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Sprint-1/prep/percentage.html b/Sprint-1/prep/percentage.html
new file mode 100644
index 000000000..f133d8195
--- /dev/null
+++ b/Sprint-1/prep/percentage.html
@@ -0,0 +1,142 @@
+
+
+
+
+
+ Percentage Exercise
+
+
+
+
Percentage Exercise
+
+
+
Convert Decimal to Percentage
+
enter a decimal number and click the button to see the percentage:
+
+
+
+
+
+
+
Calculate the area and perimeter
+
enter the width and height to calculate the area and perimeter
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Sprint-1/prep/simpleExampleOfEventlistener.html b/Sprint-1/prep/simpleExampleOfEventlistener.html
new file mode 100644
index 000000000..741df24d5
--- /dev/null
+++ b/Sprint-1/prep/simpleExampleOfEventlistener.html
@@ -0,0 +1,94 @@
+
+
+
+
+
+
+ Simple Example of Event Listener
+
+
+
+
+
Simple Example of Event Listener
+click the button to see the event listener in action:
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Sprint-1/prep/test.html b/Sprint-1/prep/test.html
new file mode 100644
index 000000000..aec845e6d
--- /dev/null
+++ b/Sprint-1/prep/test.html
@@ -0,0 +1,23 @@
+
+
+
+
+
+ Test Page
+
+
+
+