Dagim H.

task-1/leap-year.js

@@ -1,9 +1,23 @@
 import promptSync from 'prompt-sync';
 const prompt = promptSync();
 
-
-// Write your code here
-// Guidance:
 // Step 1: prompt the user to enter a year
+let input = prompt("Enter the year: ");
+
 // Step 2: convert the user input to a number so we can perform calculations
+let year = Number(input);
+
 // Step 3: Implement the logic
+if (isNaN(year) || year < 1 || year > 9999) {
+    console.log("Invalid year!");
+} else {
+    if (year % 400 === 0) {
+    console.log("Yes, " + year + " is a leap year");
+    } else if (year % 100 === 0) {
+    console.log("No, " + year + " is not a leap year");
+    } else if (year % 4 === 0) { 
+    console.log("Yes, " + year + " is a leap year");
+    } else {
+    console.log("No, " + year + " is not a leap year");
+     }
+} 

task-2/login.js

@@ -4,9 +4,25 @@ import { errorMessage, successMessage } from './app.js';
 let incorrectAttempts = 0;
 
 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 login is already blocked
+if (incorrectAttempts >= 4) {
+    errorMessage("Login blocked: Too many incorrect attempts");
+    return;
+}
+  // check valid users
+ const isAdmin = username === "admin" && password === "Hack1234";
+ const isUser = username === "user" && password === "7654321";
+ if (isAdmin || isUser) {
+    successMessage("Logged in successfully");
+    incorrectAttempts = 0;
+ }  else {
+    incorrectAttempts++;
+    if (incorrectAttempts >= 4) {
+      errorMessage("Login blocked: Too many incorrect attempts");
+    } else {
+     errorMessage("Incorrect credentials");
+    }
+  }
 }
 
 // Do not change the line below

task-3/converter.js

@@ -1,37 +1,44 @@
 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: ");
+// BUG 1 FIXED: "conole.log" was misspelled, corrected to console.log
+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 the current exchange rate");  // FEATURE added to Option 3 for displaying exchange rate
+const menuSelection = prompt("Select your option [1, 2, or 3]:");
 
 console.log("\n");
 
 if (menuSelection === "1") {
   // EUR to USD
-  const eurAmountInput = prompt("Enter amount in EUR: ");
+  const eurAmountInput = prompt("Enter amount in EUR:");
   const eurAmountNum = Number(eurAmountInput);
-  if (Number.isNaN(eurAmountNum) || eurAmountNum > 0) {
+  // BUG 3 FIXED: Condition was wrong (eurAmountNum > 0)
+  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 usdAmountInput = prompt("Enter amount in USD:");
   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 ' + usdAmountNum.toFixed(2) + ' EUR.');
+    // BUG 2 FIXED: Wrong variable name (eur_usd_rate) now corrected to EUR_USD_RATE
+    const eurAmount = usdAmountNum / EUR_USD_RATE;
+         // BUG 2 Previously printed usdAmountNum twice
+    console.log(usdAmountNum.toFixed(2) + ' USD is equal to ' + eurAmount.toFixed(2) + ' EUR.');
   }
+} else if (menuSelection === "3") {
+    // FEATURE added to Show exchange rate
+    console.log(`The current exchange rate is 1 EUR = ${EUR_USD_RATE} USD.`);
 } else {
-  console.log("Invalid selection. Please choose either 1 or 2.");
+    console.log("Invalid selection. Please choose either 1, 2, or 3.");
 }