Gain insights into R, the leading language for data analysis. Learn about its basics, advanced concepts, and practical coding to drive valuable insights from large datasets.

The digital world we live in has given companies and people access to staggering amounts of data, and anyone that can make use of that to drive valuable insights stands to benefit. The ability to work with large amounts of data is becoming a standard requirement for countless jobs across multiple industries.

Enter R, probably the most well-known language for data analysis. It's been used for years due to its robust statistical functionality, outstanding graphing ability, and extensibility through packages.

This interactive course will get you up to speed and assumes no prior knowledge of R. You'll start with the very basics and work your way up to advanced concepts like exception handling. By the time you're done, you'll be able to write detailed, useful code in R yourself.

Learn R from Scratch

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.

Getting Started

Variables

Exploring R Objects

R Operators and Notation

Conditional Statements

Loops

Functions

Input/Output

Exception Handling

Classes

Fun Challenges

Conclusion

Test Your Knowledge 4