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

JavaScript is a versatile language essential for web development, working alongside HTML and CSS to build both simple and complex web applications. This course 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 course, 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 the result when the following program is executed?

```JavaScript
for (let a of [9, 2, 5]) {
    console.log(a);
}
```

What is the result when the following program is executed?
<pre><code class="language-JavaScript">for (let a of [9, 2, 5]) {
 console.log(a);
}
</code></pre>

What is the result when the following program is executed?

```JavaScript
for (let c = 0; c < 3; c++) {
 console.log(c);
}
```

What is the result when the following program is executed?
<pre><code class="language-JavaScript">for (let c = 0; c &lt; 3; c++) {
 console.log(c);
}
</code></pre>

What is the result when the following program is executed?

```JavaScript
for (let i = 1; i < 20; i += 7) {
 console.log(i);
}
```

What is the result when the following program is executed?
<pre><code class="language-JavaScript">for (let i = 1; i &lt; 20; i += 7) {
 console.log(i);
}
</code></pre>

What is the result when the following program is executed?

```JavaScript
for (let j = 0; j < 4; j++) {
 console.log(3 ** j);
}
```

What is the result when the following program is executed?
<pre><code class="language-JavaScript">for (let j = 0; j &lt; 4; j++) {
 console.log(3 ** j);
}
</code></pre>

What is the output when the following program is executed?

```JavaScript
let num1 = 23;
let num2 = 1;
while (num1 > 0) {
    num2 = num1 % 10;
    num1 = parseInt(num1 / 10);
}
console.log(num2);
```


What is the output when the following program is executed?
<pre><code class="language-JavaScript">let num1 = 23;
let num2 = 1;
while (num1 &gt; 0) {
 num2 = num1 % 10;
 num1 = parseInt(num1 / 10);
}
console.log(num2);
</code></pre>

`( 1 2 )` 
`( 1 3 )` 
`( 2 2 )` 
`( 2 3 )`

What is the output when the following program is executed?

```JavaScript
let row = 1,
 col = 2;
while (row < 3) {
 while (col < 4) {
 console.log('(' + row + ' ' + col + ')');
 row += 1;
 col += 1;
 }
}
```

What is the output when the following program is executed?
<pre><code class="language-JavaScript">let row = 1,
 col = 2;
while (row &lt; 3) {
 while (col &lt; 4) {
 console.log('(' + row + ' ' + col + ')');
 row += 1;
 col += 1;
 }
}
</code></pre>

`+` `+` `+` `-` `+` `+` `+` `-`

`+` `+` `+` `-` `+` `+` `+` `-` `+` `+` `+` `-`

`+` `+` `-` `+` `+` `-` `+` `+` `-`

What is the result when the following program is executed?

```JavaScript
for (let r = 1; r < 3; r++) {
 for (let c = 2; c < 4; c++) {
 console.log('+');
 }
 console.log('-');
}
```

What is the result when the following program is executed?
<pre><code class="language-JavaScript">for (let r = 1; r &lt; 3; r++) {
 for (let c = 2; c &lt; 4; c++) {
 console.log('+');
 }
 console.log('-');
}
</code></pre>

Test your knowledge of repetition with loops.

About the Course

JavaScript Basics

Loops in JavaScript

JavaScript Arrays and Strings

JavaScript Functions

Wrap Up

Quiz on Repetition with Loops