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

## The Classic `Hello World` Program
The first program we are going to write is the classic **Hello World** program. 

The purpose of this program is to display the text “Hello World!” to the user. Let's begin.

# Simply use the print() keyword
# Write anyting between quotation marks to print on console.
print("Hello World")

> A name/text followed by brackets `()` is called a `function`. We will be learning functions in a later chapter. But for now, just remember that functions are used to perform a task. For example, this `print()` function is performing a task, i.e., **printing**.

### Comments in R
You might also notice other peculiar lines in the above code **(Line number 1 and 2)**. These lines are `comments` and they begin with the character `#`. For example:
```r
# This is a comment
```
Comments are not executed by the compiler. They are ignored while executing a program. However, it is important to give comments so that the code becomes readable. Also, it helps other programmers to know exactly what is going on in the code.

The code below contains only comments:

# The Classic `Hello World` Program
The first program we are going to write is the classic **Hello World** program. 

The purpose of this program is to display the text “Hello World!” to the user. Let's begin.

> A name/text followed by brackets `()` is called a `function`. We will be learning functions in a later chapter. But for now, just remember that functions are used to perform a task. For example, this `print()` function is performing a task, i.e., **printing**.

## Comments in R
You might also notice other peculiar lines in the above code **(Line number 1 and 2)**. These lines are `comments` and they begin with the character `#`. For example:
```r
# This is a comment
```
Comments are not executed by the compiler. They are ignored while executing a program. However, it is important to give comments so that the code becomes readable. Also, it helps other programmers to know exactly what is going on in the code.

The code below contains only comments:

The first step to learning any language is the classic "Hello World" program.

Getting Started

Variables

Exploring R Objects

R Operators and Notation

Conditional Statements

Loops

Functions

Input/Output

Exception Handling

Classes

Fun Challenges

Conclusion

Hello World

The Classic `Hello World` Program