London 9 - Lovelace - Oleksii Chepurnyi - JavaScript-Core1-Coursework-Week1

exercises/B-hello-world/exercise.js

@@ -1 +1,3 @@
-console.log("Hello world");
+console.log(78967868678);
+
+console.log("Hello World.I just started learning JavaScript!");

exercises/C-variables/exercise.js

@@ -1,3 +1,7 @@
 // Start by creating a variable `greeting`
-
+var greeting = "Hello world";
+console.log(greeting);
+console.log(greeting);
+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";
+var messageType = typeof message;   
 console.log(message);
+console.log(messageType);

exercises/E-strings-concatenation/exercise.js

@@ -1,3 +1,7 @@
 // Start by creating a variable `message`
+var greetingStart = "Hello, my name is ";
+var name1 = "Oleks. ";
+var you = "And you ? "
+var greeting = greetingStart + name1 + you;
 
-console.log(message);
+console.log(greeting);

exercises/F-strings-methods/exercise.js

@@ -1,3 +1,25 @@
 // Start by creating a variable `message`
-
+var name1 = "Oleks";
+var nameLength = name1.length;
+var introduce1 = " My name is Oleks and my name is ";
+var introduce2 = "characters long.";
+var message = introduce1 + nameLength + " " + introduce2;
 console.log(message);
+// second way
+var name1 = "Oleks";
+var nameLength = name1.length;
+var introduce1 = "      My name is ";
+var introduce3 = "and my name is ";
+var introduce2 = "characters long.";
+var message = introduce1 + name1 + " "+ introduce3 + 
+nameLength + " " + introduce2;
+console.log(message);
+// trim method
+var name1 = "Oleks";
+var nameLength = name1.length;
+var introduce1 = " My name is ";
+var introduce3 = "and my name is ";
+var introduce2 = "characters long.";
+var message =
+  introduce1 + name1 + " " + introduce3 + nameLength + " " + introduce2;
+console.log(message.trim());

exercises/F-strings-methods/exercise2.js

@@ -1,3 +1,20 @@
 const name = " Daniel  ";
 
+var name1 = "Oleks";
+var nameLength = name1.length;
+var introduce1 = "      My name is ";
+var introduce3 = "and my name is ";
+var introduce2 = "characters long.";
+var message =
+  introduce1 + name1 + " " + introduce3 + nameLength + " " + introduce2;
 console.log(message);
+// trim method
+var name1 = "Oleks";
+var nameLength = name1.length;
+var introduce1 = " My name is ";
+var introduce3 = "and my name is ";
+var introduce2 = "characters long.";
+var message =
+  introduce1 + name1 + " " + introduce3 + nameLength + " " + introduce2;
+console.log(message.trim());
+

exercises/G-numbers/exercise.js

@@ -1 +1,12 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+var numberOfStudents = 50;
+var numberOfMentors = 10;
+var stud = "Number of students: ";
+console.log(stud + numberOfStudents);
+var ment = "Number of mentors: ";
+console.log(ment + numberOfMentors);
+var total = "Total number of students and mentors: ";
+var sum = numberOfMentors + numberOfStudents;
+console.log(total + sum);
+
+

exercises/I-floats/exercise.js

@@ -1,2 +1,29 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+var preciseAge = 30.612437;
+varroughAge = Math.round(preciseAge); // 30
+console.log(varroughAge);
+
+//from G ex + new solution
+
+var stud = "Number of students: ";
+console.log(stud + numberOfStudents);
+var ment = "Number of mentors: ";
+console.log(ment + numberOfMentors);
+var total = "Total number of students and mentors: ";
+var sum = numberOfMentors + numberOfStudents;
+console.log(total + sum);
+var percentageStudents = 100*numberOfStudents/sum
+var percentageMentors = 100*numberOfMentors/sum
+var roundStudents = Math.round(percentageStudents);
+var roundMentors = Math.round(percentageMentors);
+
+console.log("Percentage mentors: " + roundMentors + " %.");
+console.log("Percentage students: " + roundStudents + " %.");
+//     Result 
+//     31
+//    Number of students: 15
+//    Number of mentors: 8
+//    Total number of students and mentors: 23
+//    Percentage mentors: 35 %.
+//    Percentage students: 65 %.

exercises/J-functions/exercise.js

@@ -1,7 +1,21 @@
 function halve(number) {
-  // complete the function here
+ return number/2;
 }
 
 var result = halve(12);
+console.log("result 12/2=", result);
 
-console.log(result);
+var result = halve(24);
+console.log("result 24/2=", result);
+
+var result = halve(100);
+console.log("result 100/2=", result);
+
+var result = halve(365);
+
+console.log("result 365/2=", result);
+
+//  result 12/2= 6
+//  result 24/2= 12
+//  result 100/2= 50
+//  result 365/2= 182.5

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);
+console.log("result 12 x 3 = ", result);
+
+//   result 12 x 3 =  36

exercises/K-functions-parameters/README.md

@@ -1,4 +1,4 @@
-The input given to a function is called a **parameter**.
+"The input given to a function is called a **parameter**.
 
 A function can take more than one parameter:
 

exercises/K-functions-parameters/exercise.js

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

exercises/K-functions-parameters/exercise2.js

@@ -1,5 +1,7 @@
 // Declare your function first
-
+function divide ( a, b) {
+    return a / b;
+}
 var result = divide(3, 4);
 
-console.log(result);
+console.log("a / b = ", result);

exercises/K-functions-parameters/exercise3.js

@@ -1,5 +1,8 @@
-// Write your function here
-
+function createGreeting(name) {
+    return ("Hello, my name is " + name );
+}
 var greeting = createGreeting("Daniel");
 
 console.log(greeting);
+
+//  Hello, my name is Daniel

exercises/K-functions-parameters/exercise4.js

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

exercises/K-functions-parameters/exercise5.js

@@ -1,5 +1,11 @@
 // Declare your function here
-
+function createLongGreeting(name, age) {
+    return ("Hello, my name is " + name + " and I am "
+     + age + " years old")
+}
 const greeting = createLongGreeting("Daniel", 30);
 
 console.log(greeting);
+
+
+//      Hello, my name is Daniel and I am 30 years old

exercises/L-functions-nested/exercise.js

@@ -3,3 +3,19 @@ var mentor2 = "Irina";
 var mentor3 = "Mimi";
 var mentor4 = "Rob";
 var mentor5 = "Yohannes";
+
+function shoutyGreeting(mentor) {
+    return ("HELLO," + " " + mentor.toUpperCase() + " !")
+}
+console.log(shoutyGreeting(mentor1));
+console.log(shoutyGreeting(mentor2));
+console.log(shoutyGreeting(mentor3));
+console.log(shoutyGreeting(mentor4));
+console.log(shoutyGreeting(mentor5));
+
+//    Result a shouty greeting to each one mentors:  
+//     HELLO, DANIEL !
+//     HELLO, IRINA !
+//     HELLO, MIMI !
+//     HELLO, ROB !
+//     HELLO, YOHANNES !

extra/1-currency-conversion.js

@@ -5,7 +5,11 @@
   Write a function that converts a price to USD (exchange rate is 1.4 $ to £)
 */
 
-function convertToUSD() {}
+function convertToUSD(price) {
+  let dol = (price*1.4).toFixed(2);
+  return Number(dol);
+}
+
 
 /*
   CURRENCY CONVERSION
@@ -15,7 +19,9 @@ function convertToUSD() {}
   They have also decided that they should add a 1% fee to all foreign transactions, which means you only convert 99% of the £ to BRL.
 */
 
-function convertToBRL() {}
+function convertToBRL(price) {
+  return Number((price*0.99*5.7).toFixed(2));
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

extra/2-piping.js

@@ -16,26 +16,29 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(number1, number2) {
+return number1 + number2;
 }
 
-function multiply() {
-
+function multiply(number1, number2) {
+return number1 * number2;
 }
 
-function format() {
-
+function format(n) {
+return "£" + n;
 }
 
 const startingValue = 2;
 
 // Why can this code be seen as bad practice? Comment your answer.
-let badCode =
+let badCode = format(multiply(add(startingValue, 10), startingValue)); // Because vjhjjk
 
 /* BETTER PRACTICE */
 
-let goodCode =
+let sum = add(startingValue, 10);
+let multiplies = multiply(sum, startingValue);
+let formNumber = format(multiplies);
+let goodCode = formNumber;
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.