This interactive R course covers everything from the basics, variables, and data types to advanced topics, such as recursion, file handling, and S3/S4 classes in R.

In today’s data-driven world, the ability to analyze large datasets is becoming a vital skill across industries. R, one of the most powerful languages for data analysis.
This interactive R course is designed for beginners, with no prior knowledge of R programming required. You will begin with fundamental concepts, such as R variables, data types in R, and basic functions like R print and R cat. As you progress, you will dive into more complex topics, including R vectors, lists, arrays, matrices, and data frames in R programming. You’ll also learn how to perform operations using arithmetic operators in R, relational operators in R, and logical operators in R. Further, the course covers advanced features like if statements in R, switch statements in R, loops in R, and recursion in R. 
Finally, you’ll gain hands-on experience with file handling in R, exception handling with try and except in R, and object-oriented programming using S3 and S4 classes in R.

Learn R

An `if` statement consists of a logical expression that when satisfied performs certain actions.

An <code>if</code> statement consists of a logical expression that when satisfied performs certain actions.

How many options are possible when using a single `if...else` statement?

How many options are possible when using a single <code>if...else</code> statement?

What does the following code print?

```R
sum <- 14
if ( sum < 10 ) 
{
 cat("Found")
} else 
{
 cat("Not Found ");
}
cat("the number");
```

What does the following code print?
<pre><code class="language-R">sum &lt;- 14
if ( sum &lt; 10 ) 
{
 cat(&quot;Found&quot;)
} else 
{
 cat(&quot;Not Found &quot;);
}
cat(&quot;the number&quot;);
</code></pre>

Evaluate (to true or false) each of the following expressions:

```R
10 <= 10 10 < 10 -10 > 10 -10 > -10
```

Evaluate (to true or false) each of the following expressions:
<pre><code class="language-R">10 &lt;= 10 10 &lt; 10 -10 &gt; 10 -10 &gt; -10
</code></pre>

```R
else(<condition>) {
 ## statement1
} if 
{
 ## statement2
}
```

```R
if(<condition>) {
 ## statement1
} else if 
{
 ## statement2
}
```

```R
if(<condition>) {
 ## statement1
} elseif 
{
 ## statement2
}
```

```R
if(<condition>) 
{
 ## statement1
} else 
{
 ## statement2
}
```

Which of the following is valid syntax for `if...else` statement in R ?


Which of the following is valid syntax for <code>if...else</code> statement in R ?

What does the following code print?

```R
sum <- 4
if ( sum < 10 ) 
{
 cat("Found")
} 
else {
 cat("Not Found ");
 cat("the number");
}
```

What does the following code print?
<pre><code class="language-R">sum &lt;- 4
if ( sum &lt; 10 ) 
{
 cat(&quot;Found&quot;)
} 
else {
 cat(&quot;Not Found &quot;);
 cat(&quot;the number&quot;);
}
</code></pre>

The output of `ifelse()` function is sometimes a vector.

The output of <code>ifelse()</code> function is sometimes a vector.

Correct syntax of `ifelse()` function is: 
```R
ifelse(expression, condition1, condition2)
```

Correct syntax of <code>ifelse()</code> function is:
<pre><code class="language-R">ifelse(expression, condition1, condition2)
</code></pre>

The `expression` parameter for `ifelse()` function must return an alphabetic vector.

The <code>expression</code> parameter for <code>ifelse()</code> function must return an alphabetic vector.

A switch statement allows a variable to be tested for equality against a list of conditions.

A switch statement allows a variable to be tested for equality against a list of conditions.

Introduction to R

R variables

Data Structures in R

Operator in R

Conditional Statements in R

Loops in R

Function in R

Input/Output in R

Exception Handling in R

Classes in R

R Programming Challenges

Conclusion

Test Your Knowledge 4