Completed Sprint 1

Author: KKtech06

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

@@ -2,5 +2,10 @@ let count = 0;
 
 count = count + 1;
 
+console.log(count);
+
 // 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 the count variable. 
+// The = operator is an assignment operator, which assigns the value on the right (count + 1) to the variable on the left (count).

Sprint-1/1-key-exercises/2-initials.js

@@ -5,7 +5,12 @@ 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

@@ -17,7 +17,9 @@ 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("."))       ;
 
+console.log("dir:", dir);
+console.log("ext:", ext);
 // https://www.google.com/search?q=slice+mdn

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

@@ -3,7 +3,16 @@ const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 
-// In this exercise, you will need to work out what num represents?
+console.log(num);
+
+// In this exercise, you will need to work out what num represents?  
+// num represents a random whole number between the minimum and maximum values.
+
 // 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
+
+//Step 1  Generate a random decimal between 0 and 1
+//step 2 multiplys the random decimal by 100 - 1 = 99 + 1 = 100 
+//step 3 math.floor makes it a whole number between 0 and 99
+//step 4 adds 1 to make it a whole number between 1 and 100

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?
+We don't want the computer to run these 2 lines - how can we solve this problem?
+*/

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

@@ -1,4 +1,5 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+console.log(age)

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

@@ -1,5 +1,5 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
-// what's the error ?
+// what's the error ? The error is that the string is not being printed to the console because there is no console.log statement to output it.
 
-console.log(`I was born in ${cityOfBirth}`);
+console.log("I was born in Bolton");
 const cityOfBirth = "Bolton";

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(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
+
+/*
+Prediction: It wont work because cardNumber is a number and slice() only works on strings.
+Error: TypeError - cardnumber.slice is not a function. 
+Explanation: Numbers dont have the slice method.
+*/

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

@@ -1,2 +1,2 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const hour12HourClockTime = "20:53";
+const hour24HourClockTime = "08:53";

Sprint-1/3-mandatory-interpret/1-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 +12,22 @@ 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 has a function call
+// Line 5 has a function call
+// line 10 has a function call
 
 // 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?
+// I have spotted the error in line 5 becouse there was a missing comma inside the brackets.
 
 // c) Identify all the lines that are variable reassignment statements
+// Line 4 and line 5 are variable reassignment statements.
 
 // 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?
+// The purpose of this expression is to remove the commas from the string value using the replaceAll().
+