CodeYourFuture · Andy-Robertson · Jun 26, 2021 · Jun 26, 2021 · Jun 26, 2021 · Jun 26, 2021
diff --git a/exercises/A-setup-ide/README.md b/exercises/A-setup-ide/README.md
@@ -1,4 +1,4 @@
-There are some tools that will help you to write code. One of these, [Prettier](https://prettier.io/), formats your code, making it easier for you and others to read.
+There are some tools that will help you to write code. One of these, [Prettier](https://prettier.io/), formats your code, making it easier for you and others to  read.
 
 ### 1. Install prettier
 

diff --git a/exercises/B-hello-world/README.md b/exercises/B-hello-world/README.md
@@ -14,5 +14,9 @@ Inside of `exercise.js` there's a line of code that will print "Hello world!".
 
 - Try to `console.log()` something different. For example, 'Hello World. I just started learning JavaScript!'.
 - Try to console.log() several things at once.
+
 - What happens when you get rid of the quote marks?
+When executing "node exercise.js" from the terminal with no quote marks I received the error "SyntaxError: missing ) after argument list, which makes sense as with no quotation marks the debugger/interpreter is expecting only a one word value within the brackets while with the quotation marks it is expecting a string which can have multiple words with spaces".
+
 - What happens when you console.log() just a number without quotes?
+The output is a value and is highlighted in a base colour in the terminal, however, if a number is put into quotation marks it becomes a string and is highlighted in a different (string) colour.
diff --git a/exercises/B-hello-world/exercise.js b/exercises/B-hello-world/exercise.js
@@ -1 +1,9 @@
 console.log("Hello world");
+
+console.log("Hello World. I just started learning JavaScript!");
+
+console.log(12);
+
+console.log("12");
+
+console.log(Hello World. No Quotes!);
diff --git a/exercises/C-variables/exercise.js b/exercises/C-variables/exercise.js
@@ -1,3 +1,8 @@
-// Start by creating a variable `greeting`
+// Program to print a `greeting` variable in the console 3 times
+// Tried to reduce code repetition by using a for loop
 
-console.log(greeting);
+let greeting = ". Hello world";
+
+for (let i = 1; i < 4; i++) {
+  console.log(i + greeting);
+}
diff --git a/exercises/D-strings/exercise.js b/exercises/D-strings/exercise.js
@@ -1,3 +1,28 @@
-// Start by creating a variable `message`
+// Program that selects one of the three basic types of variables then outputs it along with its type.
+// Hopefully its ok that I added some randomness to this exercise by highlighting the three main data types,
+// If not or it causes jest to fail  I will re-write, it was fun though and has a 3:1 chance of printing the expected result :)
 
-console.log(message);
+// Declare and initialise variables.
+let messageChoice = 0;
+let messageType;
+let message = "";
+
+// Set `messageChoice` variable to a random number between 0 and 2 rounded to the nearest integer.
+messageChoice = Math.round(Math.random() * 2);
+
+// Determine which message to display using the random `messageChoice` value.
+if (messageChoice == 0) {
+  message = "This is a string";
+} else if (messageChoice == 1) {
+  message = 25.5;
+} else {
+  message = true;
+}
+
+// Sets `messageType` variable equal to  the variable `message` type (string, number or boolean).
+messageType = typeof message;
+
+// Outputs the selected `message` and `messageType`
+console.log(`
+${message}
+${messageType}`);
diff --git a/exercises/E-strings-concatenation/exercise.js b/exercises/E-strings-concatenation/exercise.js
@@ -1,3 +1,10 @@
-// Start by creating a variable `message`
+// Program which states my first name to practice concatenation.
 
-console.log(message);
+// Set and initialise variables and constants
+const MY_NAME = "Andrew";
+let greetingStart = "Hello, my name is ";
+let greeting = "";
+
+// Update and output `greeting`
+greeting = greetingStart + MY_NAME;
+console.log(greeting);
diff --git a/exercises/F-strings-methods/exercise.js b/exercises/F-strings-methods/exercise.js
@@ -1,3 +1,19 @@
-// Start by creating a variable `message`
+// Program that outputs a concatenated string stored in variable `message` containing constant `myName`
+// and constant `nameLength` after calculating `myNames` character length using string method .length.
+// I used constants here as `myName` will never change and consequently its length wont either, however
+// the variable `message` concatenation may be updated so I declared it using let
+
+// Declare and initialise variables and constants
+const MY_NAME = "Andrew";
+const NAME_LENGTH = MY_NAME.length;
+let message = "";
+
+// Update Message & output message
+message =
+  "My name is " +
+  MY_NAME +
+  " and my name is " +
+  NAME_LENGTH +
+  " characters long";
 
 console.log(message);
diff --git a/exercises/F-strings-methods/exercise2.js b/exercises/F-strings-methods/exercise2.js
@@ -1,3 +1,18 @@
-const name = " Daniel  ";
+// This program performs the same basic function as exercise.js
+// however using the string method .trim() to remove the white space
+// at both sides of the string " Daniel ".
+
+// Declare and initialise variables and constants
+const MY_NAME = " Daniel  ".trim();
+const NAME_LENGTH = MY_NAME.length;
+let message = "";
+
+// Update Message & output message
+message =
+  "My name is " +
+  MY_NAME +
+  " and my name is " +
+  NAME_LENGTH +
+  " characters long";
 
 console.log(message);
diff --git a/exercises/G-numbers/exercise.js b/exercises/G-numbers/exercise.js
@@ -1 +1,19 @@
-// Start by creating a variables `numberOfStudents` and `numberOfMentors`
+// Program that outputs the value of `numberOfStudents`, `numberOfMentors`
+// and `totalStudentsAndMentors` after using template string literal syntax to concatenate
+// the string stored in `message`.
+
+// Declare and initialise variables
+let numberOfStudents = 15;
+let numberOfMentors = 8;
+let totalStudentsAndMentors = 0;
+let message = "";
+
+// Calculate total number of students
+totalStudentsAndMentors = numberOfStudents + numberOfMentors;
+
+// Concatenate string
+message = `Number of students: ${numberOfStudents}
+Number of mentors: ${numberOfMentors}
+Total number of students and mentors: ${totalStudentsAndMentors}`;
+
+console.log(message);
diff --git a/exercises/I-floats/exercise.js b/exercises/I-floats/exercise.js
@@ -1,2 +1,29 @@
-var numberOfStudents = 15;
-var numberOfMentors = 8;
+// Program to calculate the percentage of students and mentors in a group.
+
+// Declare and initialise variables
+let numberOfStudents = 15;
+let numberOfMentors = 8;
+let percentValue = 0;
+let percentageStudents = 0;
+let PercentageMentors = 0;
+let result = "";
+
+// Set `percentValue` value equal to the actual percentage value for the group size as
+// this reduces the required nesting and hopefully makes the code easier read.
+percentValue = 100 / (numberOfStudents + numberOfMentors);
+
+// Performed main calculations using Math.round for both students and mentors,
+// storing the results in their respective variables. Alternatively I could have calculated
+// only one of the percentages then subtracted it from 100 (which I think would have been more efficient)
+// but felt the spirit of the exercise was to use Math.floor so did it this way.
+percentageStudents = Math.round(percentValue * numberOfStudents);
+PercentageMentors = Math.round(percentValue * numberOfMentors);
+
+// String literal syntax is used to concatenated a `result` string
+result = `
+Percentage students: ${percentageStudents}%
+Percentage mentors: ${PercentageMentors}% 
+`;
+
+// Output the result to the console
+console.log(result);
diff --git a/exercises/J-functions/exercise.js b/exercises/J-functions/exercise.js
@@ -1,7 +1,13 @@
 function halve(number) {
-  // complete the function here
+  // Function to half the input parameter `number`
+  return result = number / 2;
 }
 
-var result = halve(12);
+// Testing with specified input which also produces an integer value output
+console.log(halve(12));
 
-console.log(result);
+// Testing with an input that produces a float value output
+console.log(halve(1));
+
+// Testing 0 just to see what happens :)
+console.log(halve(0));
diff --git a/exercises/J-functions/exercise2.js b/exercises/J-functions/exercise2.js
@@ -1,7 +1,13 @@
 function triple(number) {
-  // complete function here
+  // Function to triple the input parameter `number`
+  return (result = number * 3);
 }
 
-var result = triple(12);
+// Testing with specified integer input that should produces an integer value output
+console.log(triple(12));
 
-console.log(result);
+// Testing with a float input that should produce a float output
+console.log(triple(0.3));
+
+// Testing with 0 for fun again :)
+console.log(triple(0));
diff --git a/exercises/K-functions-parameters/exercise.js b/exercises/K-functions-parameters/exercise.js
@@ -1,9 +1,13 @@
-// Complete the function so that it takes input parameters
-function multiply() {
-  // Calculate the result of the function and return it
+function multiply(numOne, numTwo) {
+  // Function to multiply two parameters together
+  return (result = numOne * numTwo);
 }
 
-// Assign the result of calling the function the variable `result`
-var result = multiply(3, 4);
+// Testing by calling the function with suggested parameters
+console.log(multiply(3, 4));
 
-console.log(result);
+// Testing by calling the function with two float parameters
+console.log(multiply(3.5, 4.7));
+
+// Testing with calling the function with 0 as parameters
+console.log(multiply(0, 0));
diff --git a/exercises/K-functions-parameters/exercise2.js b/exercises/K-functions-parameters/exercise2.js
@@ -1,5 +1,15 @@
-// Declare your function first
+function divide(numOne, numTwo) {
+  // Function to divide two parameters together
+  return (result = numOne / numTwo);
+}
 
-var result = divide(3, 4);
+// Testing by calling the function with suggested parameters
+console.log(divide(3, 4));
 
-console.log(result);
+// Testing by calling the function with two float parameters
+console.log(divide(3.5, 4.7));
+
+// Testing with calling the function with 0 as parameters, interesting
+// unlike the previous multiply function which produced a 0, this
+// produces a NaN...
+console.log(divide(0, 0));
diff --git a/exercises/K-functions-parameters/exercise3.js b/exercises/K-functions-parameters/exercise3.js
@@ -1,5 +1,6 @@
-// Write your function here
+function greeting(myName) {
+  // Function takes myName parameter (string) and adds it to a greeting
+  return `Hello, my name is ${myName}`;
+}
 
-var greeting = createGreeting("Daniel");
-
-console.log(greeting);
+console.log(greeting("Daniel"));
diff --git a/exercises/K-functions-parameters/exercise4.js b/exercises/K-functions-parameters/exercise4.js
@@ -1,5 +1,14 @@
-// Declare your function first
+function add(numOne, numTwo) {
+  // Function to add two parameters together
+  let sum = numOne + numTwo;
+  return sum;
+}
 
-// Call the function and assign to a variable `sum`
+// Testing by calling the function with suggested parameters
+console.log(add(13, 124));
 
-console.log(sum);
+// Testing by calling the function with two float parameters
+console.log(add(3.5, 4.7));
+
+// Testing with calling the function with 0 as parameters
+console.log(add(0, 0));
diff --git a/exercises/K-functions-parameters/exercise5.js b/exercises/K-functions-parameters/exercise5.js
@@ -1,5 +1,7 @@
-// Declare your function here
+function createLongGreeting(myName, myAge) {
+  // Function takes myName parameter (string) and adds it to a greeting
+  return `Hello, my name is ${myName} and I'm ${myAge} years old`;
+}
 
-const greeting = createLongGreeting("Daniel", 30);
-
-console.log(greeting);
+// Testing by calling the function with suggested parameters.
+console.log(createLongGreeting("Daniel", 30));
diff --git a/exercises/L-functions-nested/exercise.js b/exercises/L-functions-nested/exercise.js
@@ -1,5 +1,16 @@
-var mentor1 = "Daniel";
-var mentor2 = "Irina";
-var mentor3 = "Mimi";
-var mentor4 = "Rob";
-var mentor5 = "Yohannes";
+// I hope the way I have solved this exercise is ok although the readme seemed to have
+// some wiggle room (hope jest does!) but happy to redo if needed as I enjoyed thinking
+// of an alternative solution. As its the last exercise I wanted to try and be a bit creative
+// so to solve this I have put the pre-defined mentor names into an array then iterated
+// through it using a for loop which contains two nested ES6 arrow functions with omitted
+// return and curly brackets as they are on one line. Had great fun figuring out how to
+// solve it like this:)
+
+let mentors = ["Daniel", "Irina", "Mimi", "Rob", "Yohannes"];
+
+for (let i = 0; i < mentors.length; i++) {
+  let mentor = mentors[i];
+  const getNameInUpperCase = (mentor) => mentor.toUpperCase();
+  const shoutyGreeting = (mentor) => `HELLO ${getNameInUpperCase(mentor)}`;
+  console.log(shoutyGreeting(mentor));
+}