Javascript week-1 homework

week-1/Extra/1-syntax-errors.js

@@ -1,18 +1,26 @@
 // 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(firstName, age) {
+    return "Hello, my name is " + firstName + " and I am " + age + " years old";
+}
+console.log(introduceMe("Sonjide", 27));
+
+//===============================//
 
 function getTotal(a, b) {
-    total = a ++ b;
+    var total = a + b;
 
     // Use string interpolation here
-    return "The total is %{total}"
+    return `The total is ${total}`;
 }
+var result = getTotal(23, 5);
+console.log(result);
 
 /* ======= 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/2-logic-error.js

@@ -1,18 +1,23 @@
 // 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();
 }
+console.log(trimWord("  CodeYourFuture "));
+
+//======================================//
 
 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 =====
 There are some Tests in this file that will help you work out if your code is working.
 

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

@@ -1,17 +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; // it returns a random integers in between 0 and 9 including both.
 }
 
 // Add comments to explain what this function does. You're meant to use Google!
 function s(w1, w2) {
-  return w1.concat(w2);
+  return w1.concat(w2); // concat method helps to add two or more arrays, where in this case array "w1" and array "w2" are added. 
 }
 
 function concatenate(firstWord, secondWord, thirdWord) {
   // Write the body of this function to concatenate three words together.
+  return firstWord.concat(" ",secondWord," ",thirdWord);
   // Look at the test case below to understand what this function is expected to return.
 }
+console.log(concatenate('code', 'your', 'future'));
 
 /* ======= 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/4-tax.js

@@ -5,7 +5,10 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(price) {
+  return price * 1.20;
+}
+
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +20,10 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function addTaxAndFormatCurrency() {}
+function addTaxAndFormatCurrency(price) {
+  const decimalFormat = "£" + calculateSalesTax(price).toFixed(2);
+  return decimalFormat;
+}
 
 /* ======= 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 (price * 5.7) - (0.01 * 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 +16,38 @@
   the final result to the variable goodCode
 */
 
-function add() {
+function add(a, b) {
+   return a + b;
+}
 
+function multiply(x, y) {
+    return x * y;
 }
 
-function multiply() {
+function format(number) {
+    return "£" + number;
+} 
 
-}
 
-function format() {
 
-}
+// Why can this code be seen as bad practice? Comment your answer.
 
 const startingValue = 2
 
-// Why can this code be seen as bad practice? Comment your answer.
-let badCode = 
+    let badCode = format(multiply( add(startingValue,10),2));  
+    // This is code is bad practice because all the functions are on line line wwhich gives the result but doesen't looks good.
+
+
 
 /* BETTER PRACTICE */
 
-let goodCode = 
+
+    const result1 = add(startingValue, 10);
+    const result2 = multiply(result1, 2);
+    const result3 = format(result2);
+    let goodCode = result3;
+
+
 
 /* ======= 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

@@ -45,18 +45,59 @@ Very doubtful.
 
 // This should log "The ball has shaken!"
 // and return the answer.
+const veryPositiveAnswers = ["It is certain", 
+                             "It is decidedly so.", 
+                             "Without a doubt",
+                             "Yes - definitely",
+                             "You may rely on it"];
+const positiveAnswers = ["As I see it, yes", 
+                        "Most likely",
+                        "Outlook good", 
+                        "Yes", 
+                        "Signs point to yes"];
+const negativeAnswers = ["Reply hazy", 
+                         "try again",
+                         "Ask again later",
+                         "Better not tell you now",
+                         "Cannot predict now"];
+const veryNegativeAnswers = ["Concentrate and ask again",
+                             "Don't count on it",
+                             "My reply is no",
+                             "My sources say no",
+                             "Outlook not so good",
+                             "Very doubtful"];
+
+const answers = veryPositiveAnswers.concat(positiveAnswers, negativeAnswers, veryNegativeAnswers);
+
 function shakeBall() {
-}
+  console.log("The ball has shaken!");
+  const answer = answers[Math.floor(Math.random() * answers.length)];
+  return answer;
+ }
+ shakeBall();
+
 
 // This function should say whether the answer it is given is
 // - very positive
 // - positive
 // - negative
 // - very negative
 // This function should expect to be called with any value which was returned by the shakeBall function.
+
 function checkAnswer(answer) {
+  if (veryPositiveAnswers.indexOf(answer) > -1) {
+      return "very positive";
+  } else if (positiveAnswers.indexOf(answer) > -1) {
+      return "positive";
+  } else if (negativeAnswers.indexOf(answer) > -1) {
+      return "negative";
+  } else {
+      return "very negative";
+  }
 }
 
+
+
 /* ======= TESTS - DO NOT MODIFY =====
 There are some Tests in this file that will help you work out if your code is working.
 

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

@@ -1,3 +1,10 @@
 // Start by creating a variable `message`
 
-console.log(message);
+var firstName = "Suman";
+var nameLength = firstName.length;
+console.log(nameLength);
+
+var messageStart = "My name is";
+var message = `${messageStart} ${firstName} and my name is ${nameLength} charecters long.`;
+
+console.log(message);

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

@@ -1,3 +1,9 @@
-const name = " Daniel  ";
+const firstName = " Danie  ";
+console.log(firstName.trim());
+const nameLength = firstName.length;
 
+const messageStart = "My name is";
+const message = `${messageStart} ${firstName}and my name is ${nameLength} charecters long.`;
 console.log(message);
+
+

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

@@ -1,7 +1,9 @@
+
+
 function halve(number) {
   // complete the function here
+  return number / 2;
 }
 
 var result = halve(12);
-
 console.log(result);

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

@@ -1,7 +1,8 @@
 function triple(number) {
   // complete function here
-}
+  return number * 3;
 
+}
 var result = triple(12);
 
 console.log(result);

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

@@ -1,6 +1,7 @@
 // Complete the function so that it takes input parameters
-function multiply() {
+function multiply(a, b) {
   // Calculate the result of the function and return it
+     return 3 * 4;
 }
 
 // Assign the result of calling the function the variable `result`

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

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

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

@@ -1,5 +1,9 @@
 // Write your function here
+function createGreeting (name, greetingStart) {
+    var greeting = greetingStart + name;
+    console.log(greeting);
+
+}
+var resultGreeting = createGreeting("Daniel", "Hello, my name is ");
 
-var greeting = createGreeting("Daniel");
-
-console.log(greeting);
+console.log(resultGreeting);

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

@@ -1,5 +1,12 @@
 // Declare your function first
-
+function sum(a, b) {   
+    return a + b;
+}
 // Call the function and assign to a variable `sum`
 
-console.log(sum);
+var result = sum(13, 124);
+console.log(result);
+
+
+
+

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

@@ -1,5 +1,25 @@
 // Declare your function here
 
-const greeting = createLongGreeting("Daniel", 30);
+// function greetingFcn(name, age) {
+//    const greeting = "Hello, my name is" + " " + name + " " + "and I'm " + age + " " + "years old.";
+//    return greeting;
+// }
+// console.log(greetingFcn("Daniel", 30));
+
 
+function createLongGreeting(name, age) {
+    const greeting = "Hello, my name is" + " " + name + " " + "and I'm " + age + " " + "years old.";
+    return greeting;
+}
+
+const greeting = createLongGreeting("Daniel", 30);
 console.log(greeting);
+
+
+
+
+
+
+
+
+

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

@@ -3,3 +3,28 @@ var mentor2 = "Irina";
 var mentor3 = "Mimi";
 var mentor4 = "Rob";
 var mentor5 = "Yohannes";
+
+
+function toUpper(phrase) {
+    var upperCased = phrase.toUpperCase();
+    return upperCased;
+}
+function greetingFcn(name, greetingStart) {
+   // var greeting = greetingStart + " " + name;
+    var greeting = `${greetingStart} ${name}`;
+
+  //  var upperGreeting = toUpper(greeting);   
+
+ //   return upperGreeting;
+    return toUpper(greeting);
+} 
+var greetingStart = "hello";
+
+console.log(greetingFcn(mentor1, greetingStart));
+console.log(greetingFcn(mentor2, greetingStart));
+console.log(greetingFcn(mentor3, greetingStart));
+console.log(greetingFcn(mentor4, greetingStart));
+console.log(greetingFcn(mentor5, greetingStart));
+
+
+

week-1/InClass/exercise-A.js

@@ -0,0 +1,2 @@
+console.log("Hello World")
+