CodeYourFuture · Shadi38 · Feb 19, 2023 · Feb 20, 2023 · Feb 21, 2023 · Feb 21, 2023
diff --git a/.DS_Store b/.DS_Store
diff --git a/Untitled/.DS_Store b/Untitled/.DS_Store
diff --git a/extra/1-currency-conversion.js b/extra/1-currency-conversion.js
@@ -5,7 +5,10 @@
   Write a function that converts a price to USD (exchange rate is 1.4 $ to £)
 */
 
-function convertToUSD() {}
+function convertToUSD(price) {
+ let total=price * 1.4;
+ return total;
+}
 
 /*
   CURRENCY CONVERSION
@@ -15,7 +18,10 @@ 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) {
+  let total=parseFloat((((price/100)*99)*5.7).toFixed(2));
+  return total;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

diff --git a/extra/2-piping.js b/extra/2-piping.js
@@ -16,26 +16,40 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(a,b) {
+let sum=a+b;
+return sum;
 }
 
-function multiply() {
+function multiply(a,b) {
+let mult=a*b;
+return mult;
 
 }
 
-function format() {
-
+function format(num) {
+return "£"+num;
 }
 
-const startingValue = 2;
+
 
 // Why can this code be seen as bad practice? Comment your answer.
-let badCode =
+//const is local variabe and we can't change its value
+const startingValue = 2;
+
+let badCode =format(multiply(add(startingValue,10),2));
+console.log(badCode);
+
 
 /* BETTER PRACTICE */
+//it is not easy to read and understand/ 
+
+//creating variable with let;//
 
-let goodCode =
+let summ= add(startingValue,10);
+let multiplyy=multiply(summ,2);
+let goodCode=format(multiplyy);
+/* we can understand this code better /
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

diff --git a/extra/3-magic-8-ball.js b/extra/3-magic-8-ball.js
@@ -1,40 +1,32 @@
 /**
-
   Let's peer into the future using a Magic 8 Ball!
   https://en.wikipedia.org/wiki/Magic_8-Ball 
-
   There are a few steps to being able view the future though:
   * Ask a question
   * Shake the ball
   * Get an answer
   * Decide if it's positive or negative
-
   The question can be anything, but the answers are fixed,
   and have different levels of positivity or negativity.
-
   Below are the possible answers:
-
-  ## Very positive
+  ## Very positive
     It is certain.
     It is decidedly so.
     Without a doubt.
     Yes - definitely.
     You may rely on it.
-
   ## Positive
     As I see it, yes.
     Most likely.
     Outlook good.
     Yes.
     Signs point to yes.
-
   ## Negative
     Reply hazy, try again.
     Ask again later.
     Better not tell you now.
     Cannot predict now.
     Concentrate and ask again.
-
   ## Very negative
     Don't count on it.
     My reply is no.
@@ -43,53 +35,117 @@
     Very doubtful.
 */
 
+
+const veryPositive = [
+  "It is certain.",
+  "It is decidedly so.",
+  "Without a doubt.",
+  "Yes - definitely.",
+  "You may rely on it.",
+];
+
+const positive = [
+  "As I see it, yes.",
+  "Most likely.",
+  "Outlook good.",
+  "Yes.",
+  "Signs point to yes.",
+];
+
+const negative = [
+  "Reply hazy, try again.",
+  "Ask again later.",
+  "Better not tell you now.",
+  "Cannot predict now.",
+  "Concentrate and ask again.",
+];
+
+const veryNegative = [
+  "Don't count on it.",
+  "My reply is no.",
+  "My sources say no.",
+  "Outlook not so good.",
+  "Very doubtful.",
+];
+
+const answers = [
+  "It is certain.",
+  "It is decidedly so.",
+  "Without a doubt.",
+  "Yes - definitely.",
+  "You may rely on it.",
+  "As I see it, yes.",
+  "Most likely.",
+  "Outlook good.",
+  "Yes.",
+  "Signs point to yes.",
+  "Reply hazy, try again.",
+  "Ask again later.",
+  "Better not tell you now.",
+  "Cannot predict now.",
+  "Concentrate and ask again.",
+  "Don't count on it.",
+  "My reply is no.",
+  "My sources say no.",
+  "Outlook not so good.",
+  "Very doubtful.",
+];
+
 // This should log "The ball has shaken!"
 // and return the answer.
 function shakeBall() {
-  //Write your code in here
-}
+
+  console.log("The ball has shaken!");
+  let finalAnswer = Math.floor(Math.random() * answers.length);
+  return answers[finalAnswer];
+};
 
 /* 
   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) {
-  //Write your code in here
-}
+  if (veryPositive.includes(answer)) {
+    return "very positive";
+  }
+  else if(positive.includes(answer)) {
+    return "positive";
+  }
+  else if (negative.includes(answer)) {
+    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.
-
 To run the tests for just this one file, type `npm test -- --testPathPattern 3-magic-8-ball` into your terminal
 (Reminder: You must have run `npm install` one time before this will work!)
 ==================================
 */
+const { toBeOneOf } = require("jest-extended");
 
 test("whole magic 8 ball sequence", () => {
   const consoleLogSpy = jest.spyOn(global.console, "log");
   const answer = shakeBall();
-
   expect(typeof answer).toEqual("string");
-
   expect(consoleLogSpy).toHaveBeenCalledTimes(1);
   expect(consoleLogSpy).toHaveBeenLastCalledWith("The ball has shaken!");
-
   expect(checkAnswer(answer)).toBeOneOf([
     "very positive",
     "positive",
     "negative",
     "very negative",
   ]);
 });
-
 test("magic 8 ball returns different values each time", () => {
   const seenAnswers = new Set();
   for (let i = 0; i < 10; ++i) {
@@ -100,19 +156,16 @@ test("magic 8 ball returns different values each time", () => {
       "Expected to get different random answers each time shakeBall was called, but always got the same one"
     );
   }
-
   let seenPositivities = new Set(Array.from(seenAnswers.values()).map(checkAnswer));
   if (seenPositivities.size < 2) {
     throw Error(
       "Expected to random answers with different positivities each time shakeBall was called, but always got the same one"
     );
   }
 });
-
 test("checkAnswer works for `It is decidedly so.`", () => {
   expect(checkAnswer("It is decidedly so.")).toEqual("very positive");
 });
-
 test("checkAnswer works for `My reply is no.`", () => {
   expect(checkAnswer("My reply is no.")).toEqual("very negative");
-});
+});
diff --git a/mandatory/1-syntax-errors.js b/mandatory/1-syntax-errors.js
@@ -1,16 +1,16 @@
 // 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 "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;
 
-  return "The total is total";
+  return `The total is ${total}`;
 }
 
 /* 

diff --git a/mandatory/2-logic-error.js b/mandatory/2-logic-error.js
@@ -1,16 +1,16 @@
 // The syntax for these functions is valid but there are some errors, find them and fix them
 
 function trimWord(word) {
-  return wordtrim();
+  return word.trim();
 }
 
 function getStringLength(word) {
-  return "word".length();
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  multyple = a * b * c;
+  return multyple;
 }
 
 /* 

diff --git a/mandatory/3-function-output.js b/mandatory/3-function-output.js
@@ -1,4 +1,5 @@
 // Add comments to explain what this function does. You're meant to use Google!
+//The java.lang.Math.random() method returns a pseudorandom double type number greater than or equal to 0.0 and less than 1.0  
 function getRandomNumber() {
   return Math.random() * 10;
 }
@@ -7,10 +8,12 @@ function getRandomNumber() {
 function combine2Words(word1, word2) {
   return word1.concat(word2);
 }
+// The concat() method joins two or more strings 
 
 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.
+ // Look at the test case below to understand what this function is expected to return.
+ return firstWord.concat(" ",secondWord," ",thirdWord);
 }
 
 /* 

diff --git a/mandatory/4-tax.js b/mandatory/4-tax.js
@@ -5,7 +5,11 @@
   Sales tax is 20% of the price of the product.
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(price) {
+return price + (price/100)*20 ;
+
+
+}
 
 /*
   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) {
+  total=calculateSalesTax(price).toFixed(2) 
+  return "£"+total;
+}
 
 /* 
 ===================================================