Resolution of exercises inClass

week-1/Extra/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;
+    total = a + b;
 
     // Use string interpolation here
-    return "The total is %{total}"
+    return `The total is ${total}`
 }
 
 /* ======= TESTS - DO NOT MODIFY =====

week-1/Extra/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/Extra/3-function-output.js

@@ -2,15 +2,19 @@
 function getNumber() {
   return Math.random() * 10;
 }
+// Math.random returns a random number between 0 (inclusive),  and 1 (exclusive). But, in this case, this number will be multiplied by 10. Then this function will return a number between 0 and 10(exclusive). 
+
 
 // Add comments to explain what this function does. You're meant to use Google!
 function s(w1, w2) {
   return w1.concat(w2);
 }
+// return new element with w1 and w2 concatenated.
 
 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.concat(` `,secondWord,  ` `,thirdWord);
 }
 
 /* ======= TESTS - DO NOT MODIFY =====

week-1/Extra/4-tax.js

@@ -5,7 +5,11 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(originalPrice) {
+  let tax = originalPrice*0.2;
+  let taxPrice = originalPrice+tax;
+  return taxPrice;
+}
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +21,10 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function addTaxAndFormatCurrency() {}
+function addTaxAndFormatCurrency(price) {
+  let decimalPrice = calculateSalesTax(price).toFixed(2);
+  return `£${decimalPrice}`;
+}
 
 /* ======= TESTS - DO NOT MODIFY =====
 There are some Tests in this file that will help you work out if your code is working.

week-1/Extra/5-currency-conversion.js

@@ -5,7 +5,9 @@
   Write a function that converts a price to USD (exchange rate is 1.4 $ to £)
 */
 
-function convertToUSD() {}
+function convertToUSD(price) {
+  return price*1.4
+}
 
 /*
   CURRENCY FORMATTING
@@ -15,7 +17,9 @@ 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 (0.99*price)*5.7;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

week-1/Extra/6-piping.js

@@ -16,26 +16,32 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(x,y) {
+    return x+y;
 }
 
-function multiply() {
-
+function multiply(x,y) {
+    return x*y;
 }
 
-function format() {
-
+function format(x) {
+    return `£${x.toString()}`
 }
 
 const startingValue = 2
 
 // Why can this code be seen as bad practice? Comment your answer.
-let badCode = 
+let badCode = format((startingValue+10)*2);
 
 /* BETTER PRACTICE */
 
-let goodCode = 
+function toGoodCode(number) {
+    let operation = (number+10)*2;
+    let resultFormated = format(operation);
+    return resultFormated;
+}
+
+let goodCode = toGoodCode(startingValue);
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

week-1/Extra/7-magic-8-ball.js

@@ -46,6 +46,8 @@ Very doubtful.
 // This should log "The ball has shaken!"
 // and return the answer.
 function shakeBall() {
+  console.log(`The ball has shaken!`)
+  return `It is certain.`;
 }
 
 // This function should say whether the answer it is given is
@@ -55,6 +57,7 @@ function shakeBall() {
 // - very negative
 // This function should expect to be called with any value which was returned by the shakeBall function.
 function checkAnswer(answer) {
+
 }
 
 /* ======= TESTS - DO NOT MODIFY =====

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

@@ -1,3 +1,11 @@
 // Start by creating a variable `message`
+// let message = 'Amanda'
+// console.log(message); 
+
+function lengthMessage(message) {
+    let lengthMessage = message.length;
+    console.log(`My name is ${message} ant the length of my name is ${lengthMessage}.`);
+}
+
+lengthMessage("amanda");
 
-console.log(message);

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

@@ -1,3 +1,9 @@
-const name = " Daniel  ";
+const names = " Amanda  ";
+const nameWithTrim = names.trim();
+let lengthNames = names.length;
+console.log(names);
+console.log(nameWithTrim);
+
+console.log(`My name is ${nameWithTrim} ant the length of my name is ${lengthNames}.`)
+
 
-console.log(message);

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

@@ -1,5 +1,5 @@
 function halve(number) {
-  // complete the function here
+  return number/2
 }
 
 var result = halve(12);

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

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

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

@@ -1,9 +1,14 @@
-// Complete the function so that it takes input parameters
-function multiply() {
-  // Calculate the result of the function and return it
-}
+// // Complete the function so that it takes input parameters
+// function multiply(x,y) {
+//   return x*y
+// }
 
-// Assign the result of calling the function the variable `result`
-var result = multiply(3, 4);
+// // Assign the result of calling the function the variable `result`
+// var result = multiply(3, 4);
+
+// console.log(result);
+
+const arrowMultiply = (x, y) => x*y;
+
+console.log(arrowMultiply(3,4));
 
-console.log(result);

week-1/Homework/K-functions-parameters/exercise2.js

@@ -1,4 +1,6 @@
-// Declare your function first
+function divide(x,y) {
+    return x/y
+}
 
 var result = divide(3, 4);
 

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

@@ -1,5 +1,6 @@
-// Write your function here
-
+function createGreeting(name) {
+    return `Hello ${name}, good night! I need to sleep.`
+}
 var greeting = createGreeting("Daniel");
 
 console.log(greeting);

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

@@ -1,5 +1,9 @@
 // Declare your function first
+function sumNumber(x,y) {
+    return x+y;
+}
 
+let sum = sumNumber(13,124)
 // Call the function and assign to a variable `sum`
 
 console.log(sum);

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

@@ -1,5 +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);
+const greeting = createLongGreeting("Amanda", 33);
 
 console.log(greeting);

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

@@ -1,5 +1,36 @@
-var mentor1 = "Daniel";
-var mentor2 = "Irina";
-var mentor3 = "Mimi";
-var mentor4 = "Rob";
-var mentor5 = "Yohannes";
+var mentor1 = "Lucia";
+var mentor2 = "Giorgio";
+var mentor3 = "Fred";
+var mentor4 = "Ananda";
+var mentor5 = "Ali";
+
+function upperCase(mentor) {
+    return mentor.toUpperCase();
+
+}
+
+// let mentorUpper = upperCase(mentor1);
+// console.log(mentorUpper);
+
+
+// function greeting(mentor){
+//     let mentorUpper = upperCase(mentor);
+//     console.log(`HELLO ${mentorUpper}`);
+//     // return `HELLO ${mentorUpper}`
+// }
+
+// best way""
+
+function greeting(mentor){
+    console.log(`HELLO ${upperCase(mentor)}`);
+}
+
+
+// let hello = greeting(mentor1)
+// console.log(hello);
+
+greeting(mentor1);
+greeting(mentor2);
+greeting(mentor3);
+greeting(mentor4);
+greeting(mentor5);

week-1/InClass/exercise-A.js

@@ -0,0 +1 @@
+console.log("Hello World!!!")

week-1/InClass/exercise-B.js

@@ -0,0 +1,10 @@
+console.log("Hello, world!")
+console.log("Halo, dunia!")
+console.log("Ciao, mundo!")
+console.log("Olá, mundo!")
+console.log("Hola, mundo!")
+console.log("Hallo Welt")
+console.log("Zdravo svijete")
+console.log("Dia duit Domhanda")
+console.log("Hola món")
+console.log("مرحبا بالعالم")

week-1/InClass/exercise-C.js

@@ -0,0 +1,5 @@
+let greeting = "great day"
+
+console.log(greeting);
+console.log(greeting);
+console.log(greeting);

week-1/InClass/exercise-D.js

@@ -0,0 +1,7 @@
+let colors = "blue, yellow";
+console.log(colors);
+
+let numQuatro = 4;
+
+console.log("The datatype of numQuatro is: " + typeof numQuatro);
+console.log("The datatype of colors is: " + typeof colors);

week-1/InClass/exercise-E.js

@@ -0,0 +1,8 @@
+const nome = "Amanda!";
+const greetingStart = "Hi, my name is ";
+
+const greeting = greetingStart + nome; 
+console.log(greeting);
+
+const newGreeting = `${greetingStart}, ${nome} and I'm linda!`
+console.log(newGreeting);

week-1/InClass/exercise-F.js

@@ -0,0 +1,7 @@
+const numberOfStudents = 15;
+const numberOfMentors = 1;
+let totalNumber = numberOfStudents + numberOfMentors;
+
+console.log(`Number of students: ${numberOfStudents}`);
+console.log(`Number of mentors: ${numberOfMentors}`);
+console.log(`Total number of students and mentors: ${totalNumber}`);

week-1/InClass/exercise-G.js

@@ -0,0 +1,9 @@
+const numberOfStudents = 15;
+const numberOfMentors = 1;
+let totalNumber = numberOfStudents + numberOfMentors;
+
+const percentageStudents = `Percentage students:  ${Math.round((numberOfStudents/totalNumber)*100)}%`;
+const percentageMentors = `Percentage mentors:  ${Math.round((numberOfMentors/totalNumber)*100)}%`;
+
+console.log(percentageStudents);
+console.log(percentageMentors);

week-1/InClass/exercise-H.js

@@ -0,0 +1,13 @@
+function exerciseH(num1, num2) {
+    let string = "The correct";
+    return `${string} sum of two numbers is: ${num1 + num2}`;
+}
+// I created a function that receive two number and do a operation. And I created a variavle inside my function who has a string. Then I concatanate the string and operation to return. 
+
+
+let result = exerciseH(5,10);
+// To read my function's return, I had to store this value on ohter variable (result). Then, to see on console, I used console.log(result). 
+
+console.log(result);
+
+// the diference between console.log and return is the console.log show the result without store this value on variable. But if I want use this result in another part of my code, I have to use "return". 

week-1/InClass/exercise-I.js

@@ -0,0 +1,11 @@
+function calculateYear(name, age){
+    let calculate = 2022 - age;
+   return `${name}, you were born in ${calculate}.`; 
+}
+
+// first option
+let year = calculateYear("Maria", 33);
+console.log(year);
+
+// second option
+console.log(calculateYear("Joao", 40));