Week3/patrick

week-1/1-exercises/B-hello-world/exercise.js

@@ -1 +1,4 @@
 console.log("Hello world");
+console.log("Hello World. I just started learning JavaScript!");
+console.log("Hello again World"); // error when quotation marks are absent
+console.log(100);

week-1/1-exercises/C-variables/exercise.js

@@ -1,3 +1,5 @@
 // Start by creating a variable `greeting`
-
+var greeting ="Hello world"
+console.log(greeting);
+console.log(greeting);
 console.log(greeting);

week-1/1-exercises/D-strings/exercise.js

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

week-1/1-exercises/E-strings-concatenation/exercise.js

@@ -1,3 +1,13 @@
 // Start by creating a variable `message`
+var greetingStart = "Hello, my name is ";
+var name = "Daniel";
 
-console.log(message);
+var greeting = greetingStart + name;
+console.log(greeting);
+
+name = "Patrick";
+console.log(greeting); // BUG: will output Daniel
+
+name = "Patrick";
+var greeting = greetingStart + name;
+console.log(greeting);

week-1/1-exercises/F-strings-methods/exercise.js

@@ -1,3 +1,22 @@
 // Start by creating a variable `message`
+var name = "Daniel";
+var nameLength = name.length;
+console.log(nameLength);
 
-console.log(message);
+var nameLowerCase = name.toLowerCase();
+console.log(nameLowerCase);
+
+name = "Patrick";
+nameLength = name.length; // have to repeat this variable so you don't get the nameLength of Daniel
+console.log(nameLength);
+
+var msg = `My name is ${name} and my name is ${nameLength} long.`;
+console.log(msg);
+
+var nameTrim = name.trim();
+name = "   Patrick  . .    .    ";
+msg = `My name is ${name} and my name is ${nameLength} long.`;
+console.log(msg);
+
+msg = `My name is ${nameTrim} and my name is ${nameLength} long.`;
+console.log(msg);

week-1/1-exercises/F-strings-methods/exercise2.js

@@ -1,3 +1,14 @@
 const name = " Daniel  ";
+var nameLength = name.length;
 
+var nameTrim = name.trim();
+
+var myName = "   Patrick    ";
+nameLength = myName.length;
+var message = `My name is ${myName} and my name is ${nameLength} long.`;
+console.log(message);
+
+nameTrim = myName.trim();
+nameLength = nameTrim.length;
+message = `My name is ${nameTrim} and my name is ${nameLength} long.`;
 console.log(message);

week-1/1-exercises/G-numbers/exercise.js

@@ -1 +1,13 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+var age = 30;
+
+var sum = 10 + 2;
+var product = 10 * 2;
+var quotient = 10 / 2;
+var difference = 10 - 2;
+
+var numberOfStudents = 15;
+var numberOfMentors = 8;
+var total = numberOfStudents + numberOfMentors;
+var msg = `The total number of students and mentors: ${total}.`
+console.log(msg);

week-1/1-exercises/I-floats/exercise.js

@@ -1,2 +1,11 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+var total = numberOfStudents + numberOfMentors;
+
+var studentPercent = Math.round(numberOfStudents / total * 100);
+var studentMsg = `Percentage students: ${studentPercent}%`;
+console.log(studentMsg);
+
+var mentorPercent = Math.round(numberOfMentors / total * 100);
+var mentorMsg = `Percentage mentors: ${mentorPercent}%`;
+console.log(mentorMsg);

week-1/1-exercises/J-functions/exercise.js

@@ -1,7 +1,14 @@
 function halve(number) {
   // complete the function here
+  return number / 2;
 }
 
 var result = halve(12);
 
 console.log(result);
+
+var result = halve(100);
+console.log(result);
+
+var result = halve(15);
+console.log(result);

week-1/1-exercises/J-functions/exercise2.js

@@ -1,5 +1,6 @@
 function triple(number) {
   // complete function here
+  return number * 3;
 }
 
 var result = triple(12);

week-1/1-exercises/K-functions-parameters/exercise.js

@@ -1,6 +1,7 @@
 // Complete the function so that it takes input parameters
-function multiply() {
+function multiply(num1, num2) {
   // Calculate the result of the function and return it
+  return num1 * num2;
 }
 
 // Assign the result of calling the function the variable `result`

week-1/1-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);
 

week-1/1-exercises/K-functions-parameters/exercise3.js

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

week-1/1-exercises/K-functions-parameters/exercise4.js

@@ -1,5 +1,7 @@
 // Declare your function first
-
+function add(num1, num2) {
+    return num1 + num2;
+}
 // Call the function and assign to a variable `sum`
-
+var sum = add(13, 124);
 console.log(sum);

week-1/1-exercises/K-functions-parameters/exercise5.js

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

week-1/1-exercises/L-functions-nested/exercise.js

@@ -1,5 +1,78 @@
+// Exercise 1
+function studentPercent(numberOfStudents, numberOfMentors) {
+    var total = numberOfStudents + numberOfMentors;
+    var studentPercent = Math.round(numberOfStudents / total * 100);
+    return studentPercent;
+}
+
+function mentorPercent(numberOfStudents, numberOfMentors) {
+    var total = numberOfStudents + numberOfMentors;
+    var mentorPercent = Math.round(numberOfMentors / total * 100); 
+    return mentorPercent;
+}
+
+// console.log(studentPercent(15, 8)); -> this line tests function studentPercent
+// console.log(mentorPercent(15, 8)); -> this line tests function mentorPercent
+
+function message(numberOfStudents, numberOfMentors) {
+    var msgStudentPercent = `Percentage students: ${studentPercent(numberOfStudents, numberOfMentors)}%`
+    var msgMentorPercent = `Percentage mentors: ${mentorPercent(numberOfStudents, numberOfMentors)}%`
+    return msgStudentPercent + "\n" + msgMentorPercent;
+}
+console.log(message(15, 8));
+
+// Exercise 2
 var mentor1 = "Daniel";
 var mentor2 = "Irina";
 var mentor3 = "Mimi";
 var mentor4 = "Rob";
 var mentor5 = "Yohannes";
+
+var shout = mentor1.toUpperCase();
+var greeting = `HELLO ${shout}`;
+console.log(greeting);
+var shout = mentor2.toUpperCase();
+var greeting = `HELLO ${shout}`;
+console.log(greeting);
+var shout = mentor3.toUpperCase();
+var greeting = `HELLO ${shout}`;
+console.log(greeting);
+var shout = mentor4.toUpperCase();
+var greeting = `HELLO ${shout}`;
+console.log(greeting);
+var shout = mentor5.toUpperCase();
+var greeting = `HELLO ${shout}`;
+console.log(greeting);
+
+var mentors = "Daniel, Irina, Mimi, Rob, Yohannes"
+console.log(mentors);
+
+var greetings = "HELLO ";
+var mentorsArray = [mentor1, mentor2, mentor3, mentor4, mentor5];
+console.log(greetings+mentorsArray[0], greetings+mentorsArray[1], greetings+mentorsArray[2], greetings+mentorsArray[3], greetings+mentorsArray[4]);
+
+function mentors() {
+    for (i = 0;i < mentorsArray.length; i++) {
+        // var SHOUT = greetings + mentorsArray[i]; *** doesn't work ***
+        // return SHOUT; *** doesn't work, so may as well stick to --> return mentorsArray[i]; ***
+        return mentorsArray[i];
+    }
+}
+console.log(mentors);
+
+
+
+// function mentors() {
+//     for (var i=0; i < mentorsArray.length; i++) {
+//         return mentors;
+//     }
+// }
+// console.log(mentors());
+
+
+// function greeting(name) {
+//     var mentor1 = "Daniel";
+//     var name = mentor1.toUpperCase();
+//     return `HELLO ${mentor1}`;
+// }
+// console.log(greeting(daniel));

week-1/2-mandatory/1-syntax-errors.js

@@ -2,18 +2,24 @@
 
 // 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 getAddition(a, b) {
-    total = a ++ b
+    var total = a + b;
 
     // Use string interpolation here
-    return "The total is %{total}"
+    return `The total is ${total}`;
+}
+
+function getRemainder(a, b) {
+    var remainder = a % b;
+    return `The remainder is ${remainder}`;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-1/2-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;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== 

week-1/2-mandatory/3-function-output.js

@@ -1,17 +1,22 @@
 // Add comments to explain what this function does. You're meant to use Google!
+// Math.random returns a random number lower than 1 and then times it by 10. So the output is always < 10.
 function getNumber() {
   return Math.random() * 10;
 }
 
 // Add comments to explain what this function does. You're meant to use Google!
+// This function joins 2 parameter values. So the output is w1, w2. It can be used to create a new set of array.
 function s(w1, w2) {
   return w1.concat(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 to expect in return
+  var space = " " + secondWord + " ";
+  return firstWord.concat(space, thirdWord);
 }
+console.log(concatenate('I', 'love', 'pizza'));
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

week-1/2-mandatory/4-tax.js

@@ -5,7 +5,19 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(sales) {
+  var tax = .2;
+  var salesTax = sales * tax;
+  var twoDecimals = salesTax.toFixed(2); // to add 2 decimal places
+  var twoDecimalsNum = parseFloat(twoDecimals); // converts text to number
+  return sales + twoDecimalsNum;
+
+  // var salesaddedTax = sales * 1.2;
+  // var twoDecimals = salesaddedTax.toFixed(2);
+  // return twoDecimals;
+}
+console.log(calculateSalesTax(17.5));
+console.log(calculateSalesTax(34));
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +29,31 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function formatCurrency() {}
+function formatCurrency(sales) {
+  function calculateSalesTax(sales) {
+    var tax = .2;
+    var salesTax = sales * tax;
+    var twoDecimals = salesTax.toFixed(2); // to add 2 decimal places
+    var twoDecimalsNum = parseFloat(twoDecimals); // converts text to number
+    return sales + twoDecimalsNum;
+  }
+  var number = calculateSalesTax(sales);
+  console.log(new Intl.NumberFormat('en-GB', {
+    style: 'currency',
+    currency: 'GBP'
+  })
+  .format(number)
+  );
+}
+
+// var number = calculateSalesTax(34);
+// console.log(new Intl.NumberFormat('en-GB', {
+//     style: 'currency',
+//     currency: 'GBP'
+//   })
+//   .format(number)
+// );
+
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.