Structure sprint 2

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

@@ -1,13 +1,20 @@
-// Predict and explain first...
+// Predict and explain first... i predicted it was going to be an error 
 //  =============> write your prediction here
-
+// SyntaxError
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
-
+//str as a parameter to the function. Then you're trying to redeclare it inside the function with let str = ...,
 function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
 // =============> write your explanation here
+//str is already declared with function, trying to redeclare it inside the function with let str is not accepted in javascript
 // =============> write your new code here
+// function capitalise(str) 
+ function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}
+console.log(capitalise("hello")); 

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

@@ -1,8 +1,9 @@
 // Predict and explain first...
-
+// SyntaxError message because the 'decimalNumber' has already been declared by function, 
+// Declaring const decimalNumber again inside the function is not accepted by javascript
 // Why will an error occur when this program runs?
 // =============> write your prediction here
-
+// SyntaxError: Identifier 'decimalNumber' has already been declared.
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
@@ -15,6 +16,11 @@ function convertToPercentage(decimalNumber) {
 console.log(decimalNumber);
 
 // =============> write your explanation here
-
+// The function convertToPercentage takes a parameter decimalNumber, Multiply it by 100 and result should be in "%" 
 // 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

@@ -4,17 +4,21 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// SyntaxError due to wrong variable
 
-function square(3) {
+function square(num) {
     return num * num;
 }
 
 // =============> write the error message here
-
+// SyntaxError: Unexpected token 
 // =============> explain this error message here
-
+// Function parameters must be valid identifiers names like num, not literal values.
 // Finally, correct the code to fix the problem
-
+// function square(num) 
 // =============> write your new code here
-
+function square(num) {
+  return num * num;
+}
+console.log(square(3)); // 
 

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

@@ -12,3 +12,7 @@ console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
 // 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

@@ -11,3 +11,10 @@ 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
+// The return statement ends before 'a + b' because JavaScript automatically inserts a semicolon after return 
+//  =============> 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

@@ -1,24 +1,29 @@
 // Predict and explain first...
 
+// my prediction is that the output will be the last digit of the number 103, because the const num is declared at the top
 // Predict the output of the following code:
+// 3 should be the output
 // =============> Write your prediction here
 
+3
 const num = 103;
 
-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)}`);
-
-// Now run the code and compare the output to your prediction
+function getLastDigit() {}
 // =============> write the output here
 // Explain why the output is the way it is
 // =============> write your explanation here
+// The const n= 103  declared first makes every other parameter under it invalid
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
+function getLastDigit(num) {
+  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
+// variable (num) is defined in the function getLastDigit() 
+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)}`);

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

@@ -16,4 +16,10 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
-}
+
+  const heightSquared = height * height;
+  const rawBMI = weight / heightSquared;
+  return Number(rawBMI.toFixed(1));
+}
+console.log(calculateBMI(70, 1.73));  // 23.4
+

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

@@ -14,3 +14,8 @@
 // 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 strToUppersnakeCase(str) {
+return str.toUpperCase().replace(/\s+/g, "_");
+}
+console.log(strToUppersnakeCase("hello there"));
+console.log(strToUppersnakeCase("lord of the rings"));

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

@@ -1,6 +1,24 @@
 // In Sprint-1, there is a program written in interpret/to-pounds.js
 
+
 // You will need to take this code and turn it into a reusable block of code.
 // 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(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);
+
+  return `£${pounds}.${pence}`;
+}
+console.log(toPounds("399p"));   // £3.99
+console.log(toPounds("99p"));    // £0.99
+console.log(toPounds("9p"))      // £0.09

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

@@ -18,17 +18,19 @@ function formatTimeDisplay(seconds) {
 
 // a) When formatTimeDisplay is called how many times will pad be called?
 // =============> write your answer here
-
+// 3 times,`${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 // 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
-
+// num = 0 — from pad(totalHours)
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
-
+// "00" — pad(0) → "0".padStart(2, "0") → "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
-
+// num = 1 — from pad(remainingSeconds), which is the third and last call.
 // 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
+//  "01" — because 1.toString() is "1" and .padStart(2, "0") → "01"
+