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

ans <- 4 * 9
ans <- ans + 2
ans <- ans - 8
cat(ans)

### Explanation
The given task here was to find the value of the equation
```
2 + 4 * 9 - 8
```
Mathematically, we need to find the value of the multiplying numbers first, keeping in mind **operator precedence**. So, we multiply $4$ and $9$ and save the value in the variable `ans`. Next, we perform addition. We can either perform subtraction or addition first, but we move from left to right: add $2$ to `ans` and store in `ans`, then, subtract $8$ from `ans`.

> Operator precedence determines which operator is performed first in an expression with more than one operators.

* `*`, `/` and `%` operators have equal precedence.
* `+` and `-` operators have equal precedence.
* `*`, `/` and `%` have higher precedence than `+` and `-`.
The operator with higher precedence is executed first in the expression.

## Solution #2: Using the Entire Expression Directly

### Explanation
This is the simpler method, just find the value of the entire string and pass to `cat()` for printing.
Here, **operator precedence** will be handled by R compiler itself. 

## Explanation
The given task here was to find the value of the equation
```
2 + 4 * 9 - 8
```
Mathematically, we need to find the value of the multiplying numbers first, keeping in mind **operator precedence**. So, we multiply $4$ and $9$ and save the value in the variable `ans`. Next, we perform addition. We can either perform subtraction or addition first, but we move from left to right: add $2$ to `ans` and store in `ans`, then, subtract $8$ from `ans`.

> Operator precedence determines which operator is performed first in an expression with more than one operators.

* `*`, `/` and `%` operators have equal precedence.
* `+` and `-` operators have equal precedence.
* `*`, `/` and `%` have higher precedence than `+` and `-`.
The operator with higher precedence is executed first in the expression.

# Solution #2: Using the Entire Expression Directly

## Explanation
This is the simpler method, just find the value of the entire string and pass to `cat()` for printing.
Here, **operator precedence** will be handled by R compiler itself. 

In this review: we give a detailed analysis of the solution to this exercise.

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

Solution Review: Arithmetic Operators

Solution #1: Operator Precedence

Explanation

Solution #2: Using the Entire Expression Directly

Explanation