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

Steps for Exception handling are:
* anticipation
* detection
* resolution

Steps for Exception handling are:
<ul>
<li>anticipation</li>
<li>detection</li>
<li>resolution</li>
</ul>

Error handlers are specialized programs that solve errors.

Error handlers are specialized programs that solve errors.

_______ represents that a problem has occurred in the program and execution of the function halts.

_______ represents that a problem has occurred in the program and execution of the function halts.

An error message cautions users without terminating the execution of the program.

An error message cautions users without terminating the execution of the program.

R has a number of ways to indicate that something’s not right

Executing any function in R requires the `warning()` function

`tryCatch()` is the only function for indicating that something unexpected has occurred

A try block is the block of code in which exceptions occur and a catch block catches and handles try block exceptions.

A try block is the block of code in which exceptions occur and a catch block catches and handles try block exceptions.

The parameter `finally` in the function `tryCatch()`  is evaluated in the very begining of the function.

The parameter <code>finally</code> in the function <code>tryCatch()</code> is evaluated in the very begining of the function.

The `warning()` function halts execution of the program if triggered.

The <code>warning()</code> function halts execution of the program if triggered.

Warning message:
In log(-4.5) : NaNs produced

Error message:
In log(-4.5) : NaNs produced

What would be the value of the given expression?
```r
log(-4.5)
```



What would be the value of the given expression?
<pre><code class="language-r">log(-4.5)
</code></pre>

We can suppress warnings using the `suppress()` function.

We can suppress warnings using the <code>suppress()</code> function.

This Quiz will take maximum 10 minutes.

This Quiz will take maximum 10 minutes.

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In the next chapter, we have some fun challenges for you that involve all the concepts that we have learned so far.

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 8

Quiz on Exception Handling