London Class 7 - Hozan Ali - JavaScript-Core-1-Coursework - Week 1

exercises/B-hello-world/exercise.js

@@ -1 +1,14 @@
 console.log("Hello world");
+
+console.log("Hello world. I just started learning JavaScript!");
+
+console.log("JavaScript is challenging but it is fun");
+
+console.log("You need to practices regularly");
+
+// This will throw an error
+// console.log(Hozan Ali) 
+
+console.log(2021);
+
+console.log(2022);

exercises/C-variables/exercise.js

@@ -1,3 +1,6 @@
 // Start by creating a variable `greeting`
+var greeting = "Hello world";
 
 console.log(greeting);
+console.log(greeting);
+console.log(greeting);

exercises/D-strings/exercise.js

@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
+var message = "This is a string";
 
 console.log(message);
+console.log(typeof message);

exercises/E-strings-concatenation/exercise.js

@@ -1,3 +1,6 @@
 // Start by creating a variable `message`
+var greetingMessage = "Hello, my name is ";
+var myName = "Hozan";
+var message = greetingMessage + myName;
 
 console.log(message);

exercises/F-strings-methods/exercise.js

@@ -1,3 +1,6 @@
 // Start by creating a variable `message`
+var myName = "Hozan";
+var nameLength = myName.length;
+var message = "My name is " + myName + " and my name is " + nameLength + " characters long";
 
 console.log(message);

exercises/F-strings-methods/exercise2.js

@@ -1,3 +1,4 @@
 const name = " Daniel  ";
+var message = "My name is " + name.trim() + " and my name is " + name.trim().length + " characters long";
 
 console.log(message);

exercises/G-numbers/exercise.js

@@ -1 +1,8 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+let numberOfStudents = 15;
+let numberOfMentors = 8;
+let sumOfParticipants = numberOfStudents + numberOfMentors;
+
+console.log("Number of students: " + numberOfStudents);
+console.log("Number of mentors: " + numberOfMentors);
+console.log("Total number of students and mentors: " + sumOfParticipants);

exercises/I-floats/exercise.js

@@ -1,2 +1,9 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+var total = numberOfStudents + numberOfMentors;
+
+var percentageOfStudents = Math.round((numberOfStudents / total) * 100) + "%";
+var percentageOfMentors = Math.round((numberOfMentors / total) * 100) + "%";
+
+console.log("Percentage of students: " + percentageOfStudents);
+console.log("Percentage of mentors: " + percentageOfMentors);

exercises/J-functions/exercise.js

@@ -1,7 +1,12 @@
 function halve(number) {
-  // complete the function here
+  return number / 2;
 }
 
 var result = halve(12);
+console.log(result);
+
+result = halve(20);
+console.log(result);
 
+result = halve(22);
 console.log(result);

exercises/J-functions/exercise2.js

@@ -1,7 +1,9 @@
 function triple(number) {
-  // complete function here
+  return number * 3;
 }
 
 var result = triple(12);
+console.log(result);
 
+result = triple (15);
 console.log(result);

exercises/K-functions-parameters/exercise.js

@@ -1,9 +1,8 @@
 // Complete the function so that it takes input parameters
-function multiply() {
-  // Calculate the result of the function and return it
+function multiply(num1, num2) {
+  return num1 * num2;
 }
 
-// Assign the result of calling the function the variable `result`
 var result = multiply(3, 4);
 
 console.log(result);

exercises/K-functions-parameters/exercise2.js

@@ -1,4 +1,7 @@
 // Declare your function first
+function divide(num1, num2){
+    return num1 / num2;
+}
 
 var result = divide(3, 4);
 

exercises/K-functions-parameters/exercise3.js

@@ -1,4 +1,7 @@
 // Write your function here
+function createGreeting(myName){
+    return "Hello, my name is " + myName;
+}
 
 var greeting = createGreeting("Daniel");
 

exercises/K-functions-parameters/exercise4.js

@@ -1,5 +1,8 @@
 // Declare your function first
-
+function addNum(num1, num2){
+    return num1 + num2;
+}
 // Call the function and assign to a variable `sum`
+var sum = addNum(13,124);
 
 console.log(sum);

exercises/K-functions-parameters/exercise5.js

@@ -1,4 +1,7 @@
 // Declare your function here
+function createLongGreeting(myName, age){
+    return `Hello, my name is ${myName} and I'm ${age} years old`;
+}
 
 const greeting = createLongGreeting("Daniel", 30);
 

exercises/L-functions-nested/exercise.js

@@ -1,5 +1,12 @@
-var mentor1 = "Daniel";
-var mentor2 = "Irina";
-var mentor3 = "Mimi";
-var mentor4 = "Rob";
-var mentor5 = "Yohannes";
+function percentage(number, total){
+    return Math.round((number / total) * 100);
+};
+
+
+function getResults(type, number, total){
+    var getPercentage = percentage(number, total);
+    return `Percentage ${type}: ${getPercentage}%`;
+};
+
+console.log(getResults("students",15,23));
+console.log(getResults("mentors",8,23));

exercises/L-functions-nested/exercise2.js

@@ -0,0 +1,20 @@
+var mentor1 = "Daniel";
+var mentor2 = "Irina";
+var mentor3 = "Mimi";
+var mentor4 = "Rob";
+var mentor5 = "Yohannes";
+
+function capitalName(name){
+    return name.toUpperCase();
+};
+
+function shoutyGreeting(greeting, name){
+    var getCapitalName = capitalName(name);
+    return `${greeting.toUpperCase()} ${getCapitalName}`;
+};
+
+console.log(shoutyGreeting("hello",mentor1));
+console.log(shoutyGreeting("hello",mentor2));
+console.log(shoutyGreeting("hello",mentor3));
+console.log(shoutyGreeting("hello",mentor4));
+console.log(shoutyGreeting("hello",mentor5));

mandatory/1-syntax-errors.js

@@ -1,17 +1,18 @@
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
+function addNumbers(a, b, c) {
     return a + b + c;
-}
+};
 
-function introduceMe(name, age)
-return "Hello, my name is " + name "and I am " age + "years old";
+function introduceMe(name, age) {
+    return "Hello, my name is " + name + " and I am " + age + " years old";
+};
 
 function getTotal(a, b) {
-    total = a ++ b;
+    var total = a + b;
 
-    return "The total is total"
-}
+    return "The total is " + total;
+};
 
 /* 
 ===================================================

mandatory/2-logic-error.js

@@ -1,16 +1,15 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  return word.trim();
 }
 
 function getWordLength(word) {
-  return "word".length();
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  return a * b * c;
 }
 
 /* 

mandatory/3-function-output.js

@@ -1,16 +1,19 @@
 // Add comments to explain what this function does. You're meant to use Google!
 function getNumber() {
-  return Math.random() * 10;
+  return Math.random() * 10;      
 }
+// The function above will return a random floating point between 0 and 10 (not included), The random() method returns a random floating number from 0 (inclusive) up to but not including 1 (exclusive)
 
 // Add comments to explain what this function does. You're meant to use Google!
 function s(w1, w2) {
   return w1.concat(w2);
 }
+// The concat() method above is used to join or concatenate the two parameters W1 and W2, so the function will return a new string of w1 + w2.
 
 function concatenate(firstWord, secondWord, thirdWord) {
   // Write the body of this function to concatenate three words together.
   // Look at the test case below to understand what this function is expected to return.
+  return `${firstWord} ${secondWord} ${thirdWord}`;
 }
 
 /* 

mandatory/4-tax.js

@@ -5,7 +5,9 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(priceBeforeTax) {
+  return priceBeforeTax + (priceBeforeTax * 0.2)
+}
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +19,9 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function addTaxAndFormatCurrency() {}
+function addTaxAndFormatCurrency(priceBeforeTax) {
+  return `£${calculateSalesTax(priceBeforeTax).toFixed(2)}`
+}
 
 /* 
 ===================================================