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

# Listing and Deleting Variables

## Listing
We can check all the variables that have been created in the workspace using the keyword `ls()`.

> <img src="/api/collection/10370001/6066104977850368/page/4580102618742784/image/6441996354846720" width="45"> To import recent packages for execution of codes on our platform, we have declared a variable r at our backend. Under normal circumstances, you will not get this variable when using the ls() command.

myRealNumeric <- 10
myDecimalNumeric <- 10.0
myCharacter <- "10"
myBoolean <- TRUE
myInteger <- 0:10
myComplex <- 5i

cat("Variables in the current directory: \n")
ls() # returns all the variables created in the workspace alphabetically
cat("\n")

## Deleting

We can delete a specific variable from the workspace. 
The keyword `rm()` can help us permanently remove one or more objects from the workspace:

myRealNumeric <- 10
myDecimalNumeric <- 10.0
myCharacter <- "10"
myBoolean <- TRUE
myInteger <- 0:10
myComplex <- 5i

cat("Variables in the current directory: \n")
ls() # returns all the variables created in the workspace
cat("\n")

cat("Deleting myRealNumeric and myDecimalNumeric \n\n")

rm(myRealNumeric, myDecimalNumeric) # delete the two mentioned variables

cat("Variables in the current directory, now: \n")
ls() # returns all the variables created in the workspace
     # myRealNumeric, myDecimalNumeric are now deleted
cat("\n")

In this lesson, we’ll learn how to List and Delete variables.

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

Basic Methods for Handling Variables