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

## Solution #1: Performing each Test Separately

testVariable <- 19
test1 <- testVariable > 4
test2 <- testVariable < 10

result <- test1 && test2
cat(result)

### Explanation
Our task was to check whether the `testVariable` lies between $4$ and $10$. For that, we first check whether the number is **greater** than $4$ and store the result in a variable `test1`. Then we check whether the number is **less** than $10$ and store the result in variable `test2`. Later, we take the `&&` of the two variables so that we can check whether both the tests pass or not and print the result.

## Solution #2: Using One Boolean Expression

testVariable <- 19
cat(testVariable > 4 && testVariable < 10)

cat(testVariable > 4 && testVariable < 10)

### Explanation

The above method is simpler. Just use relational and logical operators to make a boolean equation and print the result. R compiler is smart enough to compute the value of `testVariable > 4` first then compute the value of `testVariable < 10` and later **AND** their results. This is because the **relational operators** have higher precedence than **logical operators**. So, they are executed first and then the logical operators are applied.

# Solution #1: Performing each Test Separately

## Explanation
Our task was to check whether the `testVariable` lies between $4$ and $10$. For that, we first check whether the number is **greater** than $4$ and store the result in a variable `test1`. Then we check whether the number is **less** than $10$ and store the result in variable `test2`. Later, we take the `&&` of the two variables so that we can check whether both the tests pass or not and print the result.

# Solution #2: Using One Boolean Expression

## Explanation

The above method is simpler. Just use relational and logical operators to make a boolean equation and print the result. R compiler is smart enough to compute the value of `testVariable > 4` first then compute the value of `testVariable < 10` and later **AND** their results. This is because the **relational operators** have higher precedence than **logical operators**. So, they are executed first and then the logical operators are applied.

In this review, we give a detailed analysis of the solution to this problem.

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: Relational and Logical Operators

Solution #1: Performing each Test Separately

Explanation

Solution #2: Using One Boolean Expression

Explanation