WEST MIDLANDS-JAN-ITP|SEGUN FOLAYAN|STRCURING AND TESTING DATA|SPRINT2

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

@@ -1,13 +1,19 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> write your prediction here: The code will not run because "let" should not be use in a function.
 
-// call the function capitalise with a string input
-// interpret the error message and figure out why an error is occurring
+// call the function capitalise with a string input: done
+// interpret the error message and figure out why an error is occurring: says string has already been declared. As said earlier "let" should be eliminated
 
 function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
-// =============> write your explanation here
+
+// =============> write your explanation here:
+// Let is not needed to declare a variable inside a function.
 // =============> write your new code here
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}

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
+// Why will an error occur when this program runs? decimalNumber should be assigned a value outside the function only.
+// =============> write your prediction here: const decimalNumber = 0.5 will give an error message.
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +14,16 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> write your explanation here: The re-assignment of decimal number inside the function is unecessary
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+
+  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
+// =============> write your prediction of the error here: There is going to be an error message. As there should be a variable in place of "3"
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> write the error message here: SyntaxError: Unexpected Number
+
+// =============> explain this error message here: As there should be a variable in place of "3"
 
-// =============> explain this error message here
 
 // 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 +1,21 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> write your prediction here: the function has no return. Hence multiply ${multiply(10, 32)} will return undefined.
 
 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:
+// console.log(a*b) logs the result of the multiplication to the console but does not return any value.
 
 // 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 +1,20 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// ${sum(10, 32)} will return undefined.
 
 function sum(a, b) {
   return;
   a + b;
 }
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+//console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+//Inside the function, return should not be followed by a semi-colon
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

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

@@ -2,6 +2,7 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// The code will only output for the number declared first
 
 const num = 103;
 
@@ -15,10 +16,26 @@ 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
+//Output
+//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
+// The code will also return the last digit of num because the code does not accept parameters
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
+const 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

@@ -16,4 +16,6 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
-}
+    return weight/(height**2)
+}
+console.log(calculateBMI(60,1.65));

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 ChangeCasePluseSnake(str){
+    return str.toUpperCase().replace(" ","_");
+};
+console.log(ChangeCasePluseSnake("Hello World"));

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

@@ -4,3 +4,24 @@
 // 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 penceChange(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(penceChange("300p"));

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

@@ -10,14 +10,15 @@ 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
+//pad will be called three times
 
 // Call formatTimeDisplay with an input of 61, now answer the following: