devmentor-pl · MagdalenaKoltuniak · Feb 17, 2026 · Feb 18, 2026 · Feb 18, 2026 · Feb 18, 2026
diff --git a/01/assets/js/app.js b/01/assets/js/app.js
@@ -1,4 +1,28 @@
 const a = '4.2';
 const b = 9;
 
-console.log(a, b);
+console.log(a, b);
+
+console.log(typeof a);
+console.log(typeof b);
+
+const addition = Number(a) + b;
+const concatenation = a + b.toString();
+const subtraction = a - b;
+const multiplication = a * b;
+const division = b / a;
+const modulo = b % a;
+
+console.log(
+	`addition: ${addition}, concatenation: ${concatenation}, subtraction: ${subtraction}, multiplication: ${multiplication}, division: ${division}, modulo: ${modulo}`,
+);
+
+const arr = [addition, concatenation, subtraction, multiplication, division, modulo];
+
+arr.forEach(el => {
+	if (Number(el) >= 20) {
+		console.log(`${el} jest większe od 20`);
+	} else {
+		console.log(`${el} jest mniejsze od 20`);
+	}
+});
diff --git a/01/index.html b/01/index.html
@@ -1,12 +1,15 @@
 <!DOCTYPE html>
 <html lang="pl">
+
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>devmentor.pl - JS BASICS - #01</title>
 </head>
+
 <body>
-
+    <script src="./assets/js/app.js"></script>
 </body>
+
 </html>
diff --git a/02/app.js b/02/app.js
@@ -1,7 +1,41 @@
-
 /* rozwiązanie z pętlą for */
-const x = 4;
+// const x = 4;
+const x = Number(prompt('Podaj liczbę!'));
+
+if (isNaN(x) || x < 1 || x > 9) {
+	console.log('Wpisz poprawną liczbę z zakresu 1-9.');
+} else {
+	for (let i = 1; i < 10; i++) {
+		console.log(`${x} x ${i} = ${x * i}`);
+	}
+}
+
+/* rozwiązanie z pętlą while  */
+
+// const a = 3;
+// const n = 4;
+
+const a = Number(prompt('Podaj podstawę potęgi 1-9'));
+const n = Number(prompt('Podaj wykładnik potęgi 1-9'));
+
+if (isNaN(a) || isNaN(n) || a < 1 || a > 9 || n < 1 || n > 9) {
+	console.log('Wpisz poprawną liczbę z zakresu 1-9.');
+} else {
+	let i = 1;
+	let result = 1;
+	let text = '';
+
+	while (i <= n) {
+		result *= a;
 
+		if (i === n) {
+			text += `${a}`;
+		} else {
+			text += `${a} * `;
+		}
 
+		i++;
+	}
 
-/* rozwiązanie z pętlą while  */
+	console.log(`${text} = ${result}`);
+}
diff --git a/02/index.html b/02/index.html
@@ -1,12 +1,15 @@
 <!DOCTYPE html>
 <html lang="pl">
+
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>devmentor.pl - JS BASICS - #02</title>
 </head>
+
 <body>
-
+    <script src="./app.js"></script>
 </body>
+
 </html>
diff --git a/03/app.js b/03/app.js
@@ -4,15 +4,47 @@ const max = 100;
 const a = randomNumber(min, max);
 const b = randomNumber(min, max);
 const c = randomNumber(min, max);
+// const a = 21;
+// const b = 33;
+// const c = 21;
 
 console.log(a, b, c);
 
-
-
-
-
-
+function getSum(num1, num2, num3) {
+	const intNum1 = parseInt(num1);
+	const intNum2 = parseInt(num2);
+	const intNum3 = parseInt(num3);
+
+	return [intNum1, intNum2, intNum3]
+		.sort((a, b) => a - b)
+		.slice(-2)
+		.reduce((acc, curr) => acc + curr, 0);
+}
+
+const isEven = function (num) {
+	return typeof num !== 'number' ? null : num % 2 === 0;
+};
+
+const showInfo = (val, flag) => {
+	switch (flag) {
+		case null:
+			console.log(`Podany argument ${val} nie jest liczbą`);
+			break;
+		case true:
+			console.log(`Podany argument ${val} jest parzysty`);
+			break;
+		case false:
+			console.log(`Podany argument ${val} jest nieparzysty`);
+			break;
+		default:
+			console.log('Drugi parametr musi być: null, true lub false');
+	}
+};
 
 function randomNumber(min, max) {
-    return Math.round((Math.random() * (max - min)) + min);
-}
+	return Math.round(Math.random() * (max - min) + min);
+}
+
+const totalSum = getSum(a, b, c);
+const isNumberIsEven = isEven(totalSum);
+showInfo(totalSum, isNumberIsEven);
diff --git a/04/app.js b/04/app.js
@@ -0,0 +1,28 @@
+const min = 1;
+const max = 100;
+
+const arr = createArray(1, 100);
+console.log(arr);
+
+const largest = getLargest(arr);
+console.log(largest);
+
+const avg = getAvg(largest);
+console.log(avg);
+
+function createArray(min, max) {
+	const arr = [];
+	for (let i = 0; i < 20; i++) {
+		const num = Math.round(Math.random() * (max - min) + min);
+		arr.push(num);
+	}
+	return arr;
+}
+
+function getLargest(array) {
+	return array.sort((a, b) => b - a).slice(0, 10);
+}
+
+function getAvg(array) {
+	return array.reduce((acc, curr) => acc + curr, 0) / array.length;
+}
diff --git a/04/index.html b/04/index.html
@@ -1,12 +1,15 @@
 <!DOCTYPE html>
 <html lang="pl">
+
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>devmentor.pl - JS BASICS - #04</title>
 </head>
+
 <body>
-
+    <script src="./app.js"></script>
 </body>
+
 </html>
diff --git a/05/app.js b/05/app.js
@@ -0,0 +1,44 @@
+function Student(initFirstName, initLastName) {
+	this.firstName = initFirstName;
+	this.lastName = initLastName;
+	this.grades = {};
+}
+
+Student.prototype.addGrade = function (subject, grade) {
+	if (!this.grades[subject]) {
+		this.grades[subject] = [];
+	}
+	return this.grades[subject].push(grade);
+};
+
+Student.prototype.getAverageGrade = function (subject) {
+	if (!subject) {
+		const newArr = [];
+		for (const sub in this.grades) {
+			newArr.push(...this.grades[sub]);
+		}
+		return this.calculateAverage(newArr);
+	} else {
+		if (!this.grades[subject]) {
+			return 'Nie ma takiego przedmiotu';
+		} else {
+			return this.calculateAverage(this.grades[subject]);
+		}
+	}
+};
+
+Student.prototype.calculateAverage = function (arr) {
+	return Number((arr.reduce((acc, curr) => acc + curr, 0) / arr.length).toFixed(2));
+};
+
+const student = new Student('Jan', 'Kowalski');
+student.addGrade('maths', 4);
+student.addGrade('maths', 6);
+student.addGrade('english', 3);
+console.log(student);
+const avgMath = student.getAverageGrade('maths');
+const avgMath1 = student.getAverageGrade('math');
+console.log(avgMath);
+console.log(avgMath1);
+const avg = student.getAverageGrade();
+console.log(avg);
diff --git a/05/index.html b/05/index.html
@@ -7,6 +7,6 @@
     <title>devmentor.pl - JS BASICS - #05</title>
 </head>
 <body>
-
+    <script src="./app.js"></script>
 </body>
 </html>
-Original file line number
+Diff line change
@@ Expand Up / @@ -7,6 +7,6 @@ @@
         <title>devmentor.pl - JS BASICS - #05</title>
     </head>
     <body>
+        <script src="./app.js"></script>
     </body>
     </html>