Brussels | itp-2025-1 | daniela fajardo | sprint 1 | 02 - Complete Sprint 1 Coursework/Homework

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,5 @@ 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
+
+// The line 3 is just incrementing the counting 

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[0] + middleName[0] + lastName[0];
+
+console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

Sprint-1/1-key-exercises/3-paths.js

@@ -12,12 +12,17 @@
 const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
 const lastSlashIndex = filePath.lastIndexOf("/");
 const base = filePath.slice(lastSlashIndex + 1);
+const dir = filePath.slice(0, lastSlashIndex);
+const ext = filePath.slice(lastSlashIndex + 5);
+
 console.log(`The base part of ${filePath} is ${base}`);
+console.log(`The dir part of ${filePath} is ${dir}`);
+console.log(`The ext part of ${filePath} is ${ext}`);
+
 
 // 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 = ;
+
 
 // https://www.google.com/search?q=slice+mdn

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

@@ -2,8 +2,10 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
-
+console.log(num);
 // 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
 // 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
+
+// represents a whole random number between 1 and 100

Sprint-1/2-mandatory-errors/1.js

@@ -1,4 +1,8 @@
 // trying to create an age variable and then reassign the value by 1
-
 const age = 33;
 age = age + 1;
+
+// instead of const, we should use let because it means that the variable can change
+
+let age = 33;
+age = age + 1;

Sprint-1/2-mandatory-errors/2.js

@@ -3,3 +3,5 @@
 
 console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+
+// the line console.log can't be before the variable

Sprint-1/2-mandatory-errors/3.js

@@ -1,9 +1,14 @@
-const cardNumber = 4533787178994213;
+const cardNumber = "4533787178994213";
 const last4Digits = cardNumber.slice(-4);
 
+console.log(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
 // 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
+
+// the .slice is a string method and the number is not a string
+

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,4 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const TwelveHourClockTime = "20:53";
+const twentyFourHourClockTime = "08:53";
+
+// the name of the variable can't start with a number

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

@@ -1,11 +1,11 @@
-let carPrice = "10,000";
-let priceAfterOneYear = "8,543";
+let carPrice = "10,000"; // variable declaration
+let priceAfterOneYear = "8,543"; // variable declaration 
 
-carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+carPrice = Number(carPrice.replaceAll(",", "")); // variable reassignment statement and function call (.replaceall is replacing the comma for a empty space and the number() is converting the string into a number value)
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", "")); // variable reassignment statement and function call
 
-const priceDifference = carPrice - priceAfterOneYear;
-const percentageChange = (priceDifference / carPrice) * 100;
+const priceDifference = carPrice - priceAfterOneYear; // variable declaration
+const percentageChange = (priceDifference / carPrice) * 100; // variable declaration
 
 console.log(`The percentage change is ${percentageChange}`);
 

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

@@ -1,4 +1,4 @@
-const movieLength = 8784; // length of movie in seconds
+const movieLength = 2500000; // length of movie in seconds
 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
@@ -11,15 +11,16 @@ 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? - six variable declarations
 
-// b) How many function calls are there?
+// b) How many function calls are there? - the log(result)
 
-// c) Using documentation, explain what the expression movieLength % 60 represents
+// c) Using documentation, explain what the expression movieLength % 60 represents - Represents how many seconds remain from the movie. how many times is 60 in 8784? = 24 so that would be the remainder 
 // 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?
 
-// e) What do you think the variable result represents? Can you think of a better name for this variable?
+// d) Interpret line 4, what does the expression assigned to totalMinutes mean? - Represent how many minutes of the movie have pass
 
-// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// e) What do you think the variable result represents? Can you think of a better name for this variable? - Represents the film time elapsed and a better name could be : const time elapsed = 
+
+// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer - yes, because the format is in hours, could works with any positive number.

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

@@ -1,12 +1,12 @@
 const penceString = "399p";
 
-const penceStringWithoutTrailingP = penceString.substring(
+const penceStringWithoutTrailingP = penceString.substring( 
   0,
   penceString.length - 1
 );
 
-const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
-const pounds = paddedPenceNumberString.substring(
+const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"); 
+const pounds = paddedPenceNumberString.substring(  
   0,
   paddedPenceNumberString.length - 2
 );
@@ -25,3 +25,7 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+// 2. Its creating a new string without the "p"
+// 3. adding 0 to 3, so 0399
+// 4. create a string with the first two digits
+// 5. create a string with the last two digits