Completion of Sprint 2 tasks

Author: Ayogit1

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> Prediction: The function capitalise is possibly meant to capitalise the first letter in a string.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,10 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
+// =============> =============> write your explanation here
+// The 'str' variable on the left hand side is the same used in the function name implementation which should not be.
 // =============> write your new code here
+function capitalise(str) {
+  let capFunction = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return capFunction;
+}

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> I suspect than an error will occur
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +14,10 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
-
+// =============> write your explanation here.  The functions takes a decimal number as input and converts it to percentage by multiplying by 100
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}

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. The error is likely to be caused by square(3), '3' is supposed to be replaced by a string representing the number.
 
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
-
+// function square(3) {
+//                 ^
+//  SyntaxError: Unexpected number
 // =============> explain this error message here
-
+// The muber '3' should be used when calling the function and it should not be used as a parameter.
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
-
+function square(num) {
+    return num * num;
+}
 

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

@@ -1,14 +1,17 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> write your prediction here. It may likely have issues as console.log() is within function implementation, instead of using'return'
 
 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
+// =============> write your explanation here. Instead of having console.log() is within function implementation, it should be replaced with '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
+//  =============> write your prediction here. An error will result becasue of the ';' between return and a + b
+
 
 function sum(a, b) {
   return;
@@ -8,6 +9,9 @@ function sum(a, b) {
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here. The ideal statement should be 'return a + b; ' but this statement is separated by ';'
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function sum(a, b) {
+  return a + b;
+}

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
+// =============> Write your prediction here. It may run but give incorrect results because of const num & no parameter specified
+
 
 const num = 103;
 
@@ -15,10 +16,19 @@ 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
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> write your explanation here. num is a constant variable, it's value cannot change.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
-
+function getLastDigit() {
+  return num.toString().slice(-1);
+}
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+// getLastDigit is not working properly because the value for num is fixed at '103'
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}

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

@@ -16,4 +16,5 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
+    return Math.round((weight) / (height ** 2)).toFixed(1)
 }

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

@@ -14,3 +14,7 @@
 // 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 upCase(strCar) {
+    let result = strCar.toUpperCase().replaceAll(" ", "_");
+    return result;
+}

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
+
+function toPounds(money) {
+    const moneyWithoutTrailingP = money.substring(
+        0,
+        money.length - 1
+    );
+    const paddedPenceNumberString = moneyWithoutTrailingP.padStart(3, "0");
+    const pounds = paddedPenceNumberString.substring(
+        0,
+        paddedPenceNumberString.length - 2
+    );
+    const pence = paddedPenceNumberString
+        .substring(paddedPenceNumberString.length - 2)
+        .padEnd(2, "0");
+    result = pounds + "." + pence;
+    res = `£${pounds}.${pence}`;
+    return res;
+}
+console.log(toPounds("399p"))
+console.log(toPounds("1099p"))

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

@@ -17,18 +17,18 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> write your answer here.pad will be called three times.
 
 // 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. the value assigned to num when pad is called for the first time is 00
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here. the return value of pad is called for the first time is '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. the value assigned to num when pad is called for the last time is 01
 
 // 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. the return value assigned to num when pad is called for the last time in this program is '01'