Muna Naher ass.week02

task-1/leap-year.js

@@ -1,9 +1,20 @@
 import promptSync from 'prompt-sync';
 const prompt = promptSync();
 
+let year = prompt("Enter a year:");
 
-// 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
+// convert the input to number
+year = Number(year);
+
+// check the input vaildation 
+if (isNaN(year) || year < 1 || year > 9999) {
+  console.log("Invalid year!");
+} else {
+
+  // leap year
+  if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 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 +4,23 @@ 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 (incorrectAttempts >= 4) {
+    errorMessage("Login blocked: Too many incorrect attempts");
+    return;
+  }
+
+
+const isAdmin = username === "admin" && password === "Hack1234";
+const isUser = username === "user" && password === "7654321";
+
+if (isAdmin || isUser) {
+    successMessage("Logged in successfully");
+  } else {
+    incorrectAttempts++;
+    errorMessage("Incorrect credentials");
+  }
+
 }
 
 // Do not change the line below

task-3/converter.js

@@ -5,7 +5,7 @@ const prompt = promptSync();
 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: "); // Incorrect splleing, Bug1
 console.log("1: Convert EUR to USD");
 console.log("2: Convert USD to EUR");
 const menuSelection = prompt("Select your option [1 or 2]: ");
@@ -16,7 +16,8 @@ if (menuSelection === "1") {
   // EUR to USD
   const eurAmountInput = prompt("Enter amount in EUR: ");
   const eurAmountNum = Number(eurAmountInput);
-  if (Number.isNaN(eurAmountNum) || eurAmountNum > 0) {
+  // the condition is wrong, eurAmountNum > 0 should be eurAmountNum <=0 ,Bug2
+  if (Number.isNaN(eurAmountNum) || eurAmountNum <= 0) {
     console.log("Please enter a valid positive number for the amount.");
   } else {
     const usdAmount = eurAmountNum * EUR_USD_RATE;
@@ -25,13 +26,16 @@ if (menuSelection === "1") {
 } else if (menuSelection === "2") {
   // USD to EUR
   const usdAmountInput = prompt("Enter amount in USD: ");
-  const usdAmountNum = Number(usdAmountInput);
+  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;
+    const eurAmount = usdAmountNum / EUR_USD_RATE;  // eur_usd_rate  is not defined, it should be EUR_USD_RATE, Bug3 
     console.log(usdAmountNum.toFixed(2) + ' USD is equal to ' + usdAmountNum.toFixed(2) + ' EUR.');
   }
 } else {
   console.log("Invalid selection. Please choose either 1 or 2.");
 }
+
+
+EUR_USD_RATE