London | 26-May-ITP | Jorvan White | Sprint 2 | Coursework

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
+
+// = is assigning the value of 'count', 
+// 'let' is a declararation than enables its subject (count) to be changed
+// line 3 is taking the current value in line 1 (0) and by using '=' it is reassigning the value of 'count' to equal itself plus 1

Sprint-2/1-key-errors/0.js

@@ -1,5 +1,6 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> The fuction intends to capitalize the first letter of the input string
+//  from th left starting with the first character (str[0]).
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +10,8 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> str has already been declared as a parameter function, so it cannot be redeclared within the function body. This will cause a syntax error. To fix this, we should use a different variable name for the new string we are creating.
+// =============> 
+  function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;

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

@@ -1,7 +1,8 @@
 // Predict and explain first...
 
-// Why will an error occur when this program runs?
-// =============> write your prediction here
+// Why will an error occur when this program runs? 
+// =============> decimalNumber is a constant variable, and cannot be changed. 
+// The code is attempting to change it which will cause an error.
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +15,12 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> The code is attempting to get the percentage of decimalNumber
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  decimalNumber = 0.5;
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+console.log (convertToPercentage(0.5));

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

@@ -3,18 +3,22 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> num is not defined which causes an error.
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> 1. "Uncaught SyntaxError: Unexpected number" Means the "3" is not valid there.
+// 2. Uncaught SyntaxError: Illegal return statement. Means "num" has no idea of what it should be 
 
-// =============> explain this error message here
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
+// =============> by adding square(num) the function will work when given a number 
+function square(num) {
+    return num * num;
+}
+console.log(square(3))
 
 

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,18 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> Code is attempting to multiple a & b but there is no return value
 
 function multiply(a, b) {
   console.log(a * b);
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> because there is no return value, the outcome stays as undefined while giving the answer
+// to fix this, change "console.log" in the second row to "return"
+//
 
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+function multiply(a, b) {
+  return (a * b);
+}

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

@@ -1,5 +1,6 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> the function is attempting to add "a" & "b" together 
+// but the return is formatted wrong. 
 
 function sum(a, b) {
   return;
@@ -8,6 +9,12 @@ function sum(a, b) {
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============>  because of the way line 6 and 7 is written the answer will be undefined.
+//remove the semi colon from line 6 and then add line 7 to it.
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+
+function sum(a, b) {
+  return (a + b);
+}
+
+console.log(sum(10, 32))

Sprint-2/2-mandatory-debug/2.js

@@ -1,7 +1,8 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> The function is trying to get the last digit of "num"
+// but because on "const", the "num" is always locked to "103" leaving the return always "3"
 
 const num = 103;
 
@@ -14,11 +15,22 @@ console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// =============> Just as predicted, the function is trying to get the last digit, which is always "3"
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> because of "const" the num is always locked to "103"
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+
 
 // This program should tell the user the last digit of each number.
-// Explain why getLastDigit is not working properly - correct the problem
+// Explain why getLastDigit is not working properly
+// It's not working properly because of the "const num = 103"
+// to fix, I have removed the line and added "(num)" after "function getLastDigit"
+// In order to define what "num" is.

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -16,4 +16,11 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
-}
+}
+
+function calculateBMI(weight, height) {
+    const bmi = weight / (height * height);
+    return parseFloat(bmi.toFixed(1));
+}
+
+console.log(calculateBMI(70, 1.73));

Sprint-2/3-mandatory-implement/2-cases.js

@@ -14,3 +14,11 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+
+function Capitalise(inputString) {
+    return inputString.toUpperCase()
+
+}   
+
+Console.log(Capitalise("hello there"));

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,23 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+const penceString = "399p";
+
+const penceStringWithoutTrailingP = penceString.substring(
+  0,
+  penceString.length - 1
+);
+
+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(`£${pounds}.${pence}`);
+