Shadi A.

task-1/leap-year.js

@@ -2,8 +2,18 @@ import promptSync from 'prompt-sync';
 const prompt = promptSync();
 
 
-// Write your code here
-// Guidance:
-// Step 1: prompt the user to enter a year
-// Step 2: convert the user input to a number so we can perform calculations
-// Step 3: Implement the logic
+const yearInput = prompt("Enter a year: ");
+const year = Number(yearInput);
+
+if (isNaN(year) || year < 1 || year > 9999) {
+  console.log("Not a valid year. Please try again.");
+  return;
+const isLeapYear =
+  (year % 4 === 0 && year % 100 !== 0) ||
+  (year % 400 === 0);
+
+if (isLeapYear) {
+  console.log("Yes," + year + "is a leap year");
+} else {
+  console.log("No, " + year + "is not a leap year");
+}

task-2/login.js

@@ -2,12 +2,30 @@
 import { errorMessage, successMessage } from './app.js';
 
 let incorrectAttempts = 0;
+let isBlock = false;
 
 function onLogin(username, password) {
-  // Write your code here.
-  // Use the variables 'username' and 'password' to access the input values
-  // Use incorrectAttempts to track the number of failed attempts
+  if (isBlock) {
+    errorMessage("Login blocked: Too many incorrect attempts");
+    return;
+  }
+
+  if (
+    (username === "admin" && password === "Hack1234") ||
+    (username === "user" && password === "7654321")
+  ) {
+    successMessage("Logged in successfully");
+  } else {
+    incorrectAttempts++
+
+
+    if (incorrectAttempts >= 4) {
+      isBlock = true;
+      errorMessage("Login blocked: Too many incorrect attempts");
+    } else {
+      errorMessage("Incorrect credentials");
+    }
+  }
 }
 
-// Do not change the line below
 export { onLogin };

task-3/converter.js

@@ -1,37 +1,68 @@
-import promptSync from 'prompt-sync';
+import promptSync from "prompt-sync";
 const prompt = promptSync();
 
 // Exchange rate for EUR/USD (How much 1 EUR is in USD)
 const EUR_USD_RATE = 1.1643;
 
 // Menu display
-conole.log("Hello and welcome to the currency converter. Please choose: ");
+console.log("Hello and welcome to the currency converter. Please choose:");
 console.log("1: Convert EUR to USD");
 console.log("2: Convert USD to EUR");
-const menuSelection = prompt("Select your option [1 or 2]: ");
+console.log("3: Display current exchange rate");
 
+const menuSelection = prompt("Select your option [1, 2 or 3]: ");
 console.log("\n");
 
-if (menuSelection === "1") {
+if (menuSelection === "") {
+  console.log("Invalid option. Please choose 1, 2, or 3.");
+} else if (menuSelection === "1") {
   // EUR to USD
   const eurAmountInput = prompt("Enter amount in EUR: ");
-  const eurAmountNum = Number(eurAmountInput);
-  if (Number.isNaN(eurAmountNum) || eurAmountNum > 0) {
+
+  if (eurAmountInput === "") {
     console.log("Please enter a valid positive number for the amount.");
   } else {
-    const usdAmount = eurAmountNum * EUR_USD_RATE;
-    console.log(eurAmountNum.toFixed(2) + ' EUR is equal to ' + usdAmount.toFixed(2) + ' USD.');
+    const eurAmountNum = Number(eurAmountInput);
+
+    if (Number.isNaN(eurAmountNum) || eurAmountNum <= 0) {
+      console.log("Please enter a valid positive number for the amount.");
+    } else {
+      const usdAmount = eurAmountNum * EUR_USD_RATE;
+      console.log(
+        eurAmountNum.toFixed(2) +
+          " EUR is equal to " +
+          usdAmount.toFixed(2) +
+          " USD."
+      );
+    }
   }
+
 } else if (menuSelection === "2") {
   // USD to EUR
   const usdAmountInput = prompt("Enter amount in USD: ");
-  const usdAmountNum = Number(usdAmountInput);
-  if (Number.isNaN(usdAmountNum) || usdAmountNum < 0) {
+
+  if (usdAmountInput === "") {
     console.log("Please enter a valid positive number for the amount.");
   } else {
-    const eurAmount = usdAmountNum / eur_usd_rate;
-    console.log(usdAmountNum.toFixed(2) + ' USD is equal to ' + usdAmountNum.toFixed(2) + ' EUR.');
+    const usdAmountNum = Number(usdAmountInput);
+
+    if (Number.isNaN(usdAmountNum) || usdAmountNum <= 0) {
+      console.log("Please enter a valid positive number for the amount.");
+    } else {
+      const eurAmount = usdAmountNum / EUR_USD_RATE;
+      console.log(
+        usdAmountNum.toFixed(2) +
+          " USD is equal to " +
+          eurAmount.toFixed(2) +
+          " EUR."
+      );
+    }
   }
+
+} else if (menuSelection === "3") {
+  // Display current exchange rate
+  console.log("Current exchange rate: 1 EUR = " + EUR_USD_RATE.toFixed(4) + " USD");
+
 } else {
-  console.log("Invalid selection. Please choose either 1 or 2.");
+  console.log("Invalid option. Please choose 1, 2, or 3.");
 }