Glasgow | 25-ITP-Sep | Christelle Boten | Sprint 2 | Coursework Sprint 2

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

@@ -1,13 +1,20 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I believe the code is trying to write the first letter of a string on capital letter. But since the "str" declaration has already been used, we will need a new name
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
+// function capitalise(str) {
+//   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//   return str;
+// }
 
-// =============> write your explanation here
+// =============> write your explanation here: //There is a SynthaxError on line 9 of the code when we try to declare a new variable with the name "str". This is because the "str" name has already been used when declaring the function "capitalise".
 // =============> write your new code here
+function capitalise(str) {
+   let name = `${str[0].toUpperCase()}${str.slice(1)}`;
+   return name;
+ }
+ let str = "emma";
+ console.log(capitalise(str));

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

@@ -1,20 +1,30 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// Here the name decimalNumber in 'const decimalNumber' has already been used, so we will get a synthax Error for that line. 
 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
+// function convertToPercentage(decimalNumber) {
+//   const decimalNumber = 0.5;
+//   const percentage = `${decimalNumber * 100}%`;
 
-  return percentage;
-}
+//   return percentage;
+// }
 
-console.log(decimalNumber);
-
-// =============> write your explanation here
+// console.log(decimalNumber);
 
+// JavaScript is read from top to bottom, so when the processor reads an error, the program will stop running and will get the error message.
+//The first error is on line 9 with the reuse of the variable declaration name of 'decimalNumber.
+//The second error is on line 15 where we are trying to call the variable 'decimalNumber',which is a local variable inside the function. We cannot access this variable outside of the function. We will need to call the whole function.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${(decimalNumber * 100).toFixed(2)}`;
+  return percentage;
+}
+
+
+console.log(convertToPercentage(0.5));   
+console.log(convertToPercentage(0.1234)); 
+console.log(convertToPercentage(1)); 

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
+// =============> write your prediction of the error here: There will be an error because we put a value (3) as a function's parameter instead of using variable names. We also don't know where num comes from as we have't defined/ declared that. 
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//     return num * num;
+// }
 
-// =============> write the error message here
+// =============> write the error message here: SyntaxError: Unexpected number
 
-// =============> explain this error message here
+// =============> explain this error message here: We get an error message saying that there is an unexpected number on line 8 (Syntax Error).
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
+console.log(square(3));
 
 

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

@@ -1,14 +1,19 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> write your prediction here: There is no return value value for the function multiply. Though it print the value of a * b in the function, this function cannot be called outside of the function (on line 9). So, it will be undefinded. WE need a return
 
-function multiply(a, b) {
-  console.log(a * b);
-}
+// function multiply(a, b) {
+//   console.log(a * b);
+// }
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+// console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here: We need to change console.log on line 6 to return so that we can call in outside of the function.
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function multiply(a, b) {
+  return a * b;
+}
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

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

@@ -1,13 +1,19 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> write your prediction here: There is a semi column on line 5 after the return which separates it from line 6. We don't know what we are returning.
 
+// function sum(a, b) {
+//   return;
+//   a + b;
+// }
+
+// console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+
+// =============> write your explanation here: SInce we don't know what we are returning, we will get an undefined value for the function. 
+// Finally, correct the code to fix the problem
+//  =============> write your new code here
 function sum(a, b) {
-  return;
-  a + b;
+  return a + b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
-// Finally, correct the code to fix the problem
-//  =============> write your new code here

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

@@ -1,24 +1,33 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> Write your prediction here: We are trying to convert the last figure (last index) of a number to a String. We will surely get "2", "5" and "6"
 
-const num = 103;
+// const num = 103;
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
+// function getLastDigit() {
+//   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)}`);
+// 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)}`);
 
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// =============> write the output here: After running our code, we saw that it printed "3" all over. Which comes from our initial declaration of num = 103
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> write your explanation here: We have declared num as a const which makes it unchangeable through out. We cannot redeclare it. The second thing is that we will need to add num inside of the parameter of the function.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+let num = 103;
+
+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

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

@@ -14,6 +14,11 @@
 // Then when we call this function with the weight and height
 // It should return their Body Mass Index to 1 decimal place
 
-function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
+function calculateBmi(weight, height) {
+    const squareHeight = height * height;
+    const divide = weight / squareHeight;
+//    let BMI = divide.toFixed(2);
+    return Number(divide.toFixed(1));
+}
+console.log(calculateBmi(70, 1.73));
+console.log(typeof calculateBmi(70, 1.73));

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

@@ -14,3 +14,9 @@
 // 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 upperSnakeCase(name){
+    return name.replaceAll(' ', '_').toUpperCase();
+
+}
+console.log(upperSnakeCase("hello there"));

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

@@ -4,3 +4,18 @@
 // 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
+
+//let penceString = "399p";
+
+function convertToPounds(penceString){
+
+    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");
+    return `£${pounds}.${pence}`;
+}
+
+console.log(convertToPounds("459p"));
+console.log(convertToPounds("9p"));
+console.log(convertToPounds("399p"));

Sprint-2/4-mandatory-interpret/time-format.js

@@ -10,25 +10,26 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61));
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
 
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> write your answer here: 3 times (for hours, minutes and seconds)
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here: 0
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here: "00"
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> write your answer here: 1
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> write your answer here: "01"

Sprint-2/5-stretch-extend/format-time.js

@@ -23,3 +23,6 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+console.log(`The current output of ${currentOutput} is the same as ${targetOutput}`);
+console.log(`The second current output ${currentOutput2} is equals to ${targetOutput2}`);
+