Statistical Analysis with R

The digital world we live in has given companies and people access to staggering amounts of data, and anyone who 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.

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

This interactive module will get us up to speed with R and assumes no prior knowledge of it. We'll start with the very basics and work our way up to advanced concepts like exception handling. By the time we're done, we'll be able to write detailed, useful code in R.

Learn R from Scratch

## What is an `if...else` statement?

An `if` statement can be followed by an **optional `else` statement**, which executes when the conditional expression is `FALSE`.

Let's revisit our previous example. So now, we not only want to print "positive" when we encounter a positive number, but we also want to print "negative" when the number is **not positive**.

> We have used the word **not positive** here to show that the `else` statement is executed whenever the original **conditional statement** is NOT satisfied.

Have a look at the modified illustration:

# What is an `if...else` statement?

An `if` statement can be followed by an **optional `else` statement**, which executes when the conditional expression is `FALSE`.

Let's revisit our previous example. So now, we not only want to print "positive" when we encounter a positive number, but we also want to print "negative" when the number is **not positive**.

> We have used the word **not positive** here to show that the `else` statement is executed whenever the original **conditional statement** is NOT satisfied.

Have a look at the modified illustration:

Let's build upon our concepts of the original if statements with the else statement.

Getting Started

Variables

Exploring R Objects

R Operators and Notation

Conditional Statements

Loops

Functions

Input/Output

Exception Handling

Classes

Fun Challenges

Conclusion

if...else Statements

What is an `if...else` statement?