This module is an introduction to JavaScript for beginners, it focuses on JavaScript for web development. Learners will explore fundamental concepts using basic JavaScript programs.

Become a Web Developer

JavaScript is a versatile language essential for web development, working alongside HTML and CSS to build both simple and complex web applications. This module offers a comprehensive introduction to JavaScript for beginners, starting with fundamental concepts like problem-solving and simple JavaScript programs. Through interactive exercises, challenges, and quizzes, learners will master control structures, loops, strings, arrays, and functions.
By the end of this module, you'll have solid problem-solving skills, a deep understanding of JavaScript programming, and practical experience in writing clean, efficient code. This knowledge will prepare you for a successful career as a JavaScript developer and significantly enhance your employability in the tech industry.

Learn JavaScript

What is displayed after the following program executes if the user inputs `2` and `5`, respectively?

```JavaScript
let a = prompt();
let b = prompt();
console.log(a + b);
```

What is displayed after the following program executes if the user inputs <code>2</code> and <code>5</code>, respectively?
<pre><code class="language-JavaScript">let a = prompt();
let b = prompt();
console.log(a + b);
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let int1 = 19;
let int2 = 4;
console.log(int1 / int2);
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let int1 = 19;
let int2 = 4;
console.log(int1 / int2);
</code></pre>

What is displayed on the screen after the following program executes?

```JavaScript
let num1 = 19;
let num2 = 4;
num1 %= num2;
console.log(num1 + " " + num2);
```

What is displayed on the screen after the following program executes?
<pre><code class="language-JavaScript">let num1 = 19;
let num2 = 4;
num1 %= num2;
console.log(num1 + &quot; &quot; + num2);
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let num3 = 3;
let num4 = 2;
num3 **= num4;
console.log(num3 + " " + num4);
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let num3 = 3;
let num4 = 2;
num3 **= num4;
console.log(num3 + &quot; &quot; + num4);
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let num5 = 5, num6 = 6;
num5 /= num6;
console.log(num5 + " " + num6);
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let num5 = 5, num6 = 6;
num5 /= num6;
console.log(num5 + &quot; &quot; + num6);
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let a = b = 34;
console.log(a + " " + b);
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let a = b = 34;
console.log(a + &quot; &quot; + b);
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let c = 5, d = 6;
console.log(c + " " + d);
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let c = 5, d = 6;
console.log(c + &quot; &quot; + d);
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let a = 8;
if (a > 0) {
    console.log("Positive");
    if (a % 2 == 0) {
        console.log("Even number");
    } else {
        console.log("Odd number");
    }
} else {
    console.log("Negative");
}
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let a = 8;
if (a &gt; 0) {
 console.log(&quot;Positive&quot;);
 if (a % 2 == 0) {
 console.log(&quot;Even number&quot;);
 } else {
 console.log(&quot;Odd number&quot;);
 }
} else {
 console.log(&quot;Negative&quot;);
}
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let a = 12,
    b = 5;
if (a >= b) {
    console.log("True");
} else {
    console.log("False");
}
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let a = 12,
 b = 5;
if (a &gt;= b) {
 console.log(&quot;True&quot;);
} else {
 console.log(&quot;False&quot;);
}
</code></pre>

What is displayed on the screen after the following program is executed?

```JavaScript
let dividend = 12,
    divisor = 0;
console.log(dividend);
let quotient = dividend / divisor;
console.log(quotient);
```

What is displayed on the screen after the following program is executed?
<pre><code class="language-JavaScript">let dividend = 12,
 divisor = 0;
console.log(dividend);
let quotient = dividend / divisor;
console.log(quotient);
</code></pre>

Test your knowledge of JavaScript basics.

JavaScript Basics

Repetition with Loops

Strings and Arrays

Functions

Find Mutual Friends

Solution Review

Conclusion

Quiz on JavaScript Basics