Manchester | 25-ITP-Sep | Khalidbih | Sprint 2 | coursework/sprint-2

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

@@ -1,13 +1,21 @@
 // Predict and explain first...
 //  =============> write your prediction here
+//I think it will give an error because we have `str` twice in line 10 we should only have return without `str`  
 
 // 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 new code here
+// The error happened because 'str' was declared twice, once as a parameter and once with 'let' inside the function.
+// Also, when calling the function, using a word without quotes caused a ReferenceError.
+// After removing the duplicate declaration and passing a string with quotes, the function works correctly,
+// =============> write your new code here 
+function capitalise(str) {
+  return `${str[0].toUpperCase()}${str.slice(1)}`;
+}
+console.log(capitalise("Hard"));

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

@@ -1,20 +1,24 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
 
-// Try playing computer with the example to work out what is going on
+// =============> write your prediction here 
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
+// the error occur because the decimalNumber has already been declared.
+
+// Try playing computer with the example to work out what is going on
 
-  return percentage;
-}
 
-console.log(decimalNumber);
 
 // =============> write your explanation here
 
+// I tried to run the code it gives me SyntaxError,that the decimalNumber has already been declared, we can see in the parameter already has name decimalNumber. 
+// thats why declaring it again inside the function, causes an errors.
+
 // 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 +4,20 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+//I think it will give an error because the function parameter can not be a number like (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
-
-// Finally, correct the code to fix the problem
+// the parameter can't be a number like (3),also changing num * num to number instead to match the parameter.
+// Finally, correct the code to fix the problem.
 
 // =============> write your new code here
+function square(number) {
+    return number * number;
+}
+console.log(square(3));
+
 
 

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

@@ -1,14 +1,17 @@
 // Predict and explain first...
 
 // =============> write your prediction here
-
-function multiply(a, b) {
-  console.log(a * b);
-}
-
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+// in console.log we should just write (multiply(10,32) because writing in plain english will give us an error,
+// and it won't give the output.
 
 // =============> write your explanation here
+// the code was broken because the console.log was inside the function it not a function,by using the return it gives the outupt
+
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function multiply(a, b) {
+  return (a * b)
+}
+
+console.log(multiply(10, 32));

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

@@ -1,13 +1,16 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// The return statement is not in the right place, so the function doesn’t return the value.
 
-function sum(a, b) {
-  return;
-  a + b;
-}
+// =============> write your explanation here
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+//  The return statement is stopping the function too early, so it doesn’t return a + b.
 
-// =============> write your explanation here
 // 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

@@ -3,22 +3,40 @@
 // Predict the output of the following code:
 // =============> Write your prediction here
 
-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
+// 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
+// we will always get number 3 because num is 103 in the last digit of it is 3.
+
 // 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
+// We need num in the function as a parameter.

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

@@ -15,5 +15,10 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
+    let BMI = weight / (height * height);
+    let rounded = Math.round(BMI * 10) / 10;
+    return rounded;
+
+}
+console.log(calculateBMI(70, 1.73)); 
     // return the BMI of someone based off their weight and height
-}

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 toUpperSnakeCase(inputString) {
+   return inputString.replaceAll(" ", "_").toUpperCase();
+
+
+}
+console.log(toUpperSnakeCase("hello there"));
+console.log (toUpperSnakeCase("lord of the rings"));

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

@@ -4,3 +4,27 @@
 // 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)
+  .padEnd(2, "0");
+  return `£${pounds}.${pence}`;
+}
+ console.log (toPounds("399p"));
+ console.log (toPounds("400p"));
+ console.log (toPounds("243p"));
+ console.log (toPounds("9876p"));
+ console.log (toPounds("18p"));

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

@@ -18,17 +18,24 @@ function formatTimeDisplay(seconds) {
 
 // a) When formatTimeDisplay is called how many times will pad be called?
 // =============> write your answer here
+// It will be called 3 times 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
+// The first argument passed to pad (totalHours).
+// totalHours = 0
 
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+// pad (totalHours) = pad(0) returns "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
+// The value assigned to num when pad called last time is num = 1 because that's the remainingSeconds which is 1 after
+// we 61 divided by 60 = 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
+// The return value will be 01 because ToString gives "1" and padStart("2, 0") that adds 0 in the front 

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

@@ -23,3 +23,7 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+console.log(formatAs12HourClock("08:00"));
+console.log(formatAs12HourClock("23:00"));
+console.log(formatAs12HourClock("00:00"));
+console.log(formatAs12HourClock("12:00"))