JavaScript is a versatile programming language that enhances the interactivity and functionality of web pages. It is a core technology alongside HTML and CSS, indispensable for building simple websites as well as complex web applications.

This course is a comprehensive introduction to JavaScript programming fundamentals, starting with problem-solving and simple programs. Through hands-on exercises, challenges, and quizzes, you will learn about control structures, loops, strings, arrays, and functions, eventually gaining mastery. 

By the time you’re done with the course, you will have acquired problem-solving skills, a strong foundation in JavaScript programming, and a solid understanding of control structures, loops, strings, and arrays. This mastery of JavaScript will significantly boost your employability and open doors to diverse career opportunities in software development.

Learn to Code: JavaScript for Absolute Beginners

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

Problem Solving with Simple Programs

Decisions and Branching

JavaScript Basics

Repetition with Loops

Strings and Arrays

Functions

Appendix - Complex Programs

Wrap Up

Quiz on Repetition with Loops