Universal Code Snippet
1. Hello World Title: Hello World in R Example – Beginner R Program Description: Learn how to write your first Hello World program in R and run it instantly using an online R compiler.
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cat("Hello, World!\n")
2. Take User Input & Print Output Title: User Input and Output in R Example – readline() Description: See how to take user input and print output in R using readline() with an online R compiler.
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cat("Enter your name: ")
name <- readLines(con = "stdin", n = 1)
cat("Hello,", name, "!\n")
3. If-Else / Conditional Logic Title: If-Else Conditional Logic in R Example – Control Flow Description: Understand how if-else conditional logic works in R with this simple example using an online R compiler.
r
age <- 20
if (age >= 18) {
cat("You are an adult.\n")
} else {
cat("You are a minor.\n")
}
4. Loops Title: For Loop and While Loop in R Example – Iteration Guide Description: Learn how to use both for loop and while loop in R for iteration with this example in an online R compiler.
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5. Functions / Methods Title: Functions in R Example – Define and Call a Function Description: Learn how to define and call functions in R with this simple example you can test in an online R compiler.
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6. Arrays / Lists Title: Vectors and Lists in R Example – Create and Iterate Description: Learn how to create and iterate over vectors and lists in R using this example in an online R compiler.
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7. String Operations Title: String Operations in R Example – Length, Paste & Upper Description: Explore common string operations like length, paste, and uppercase in R using an online R compiler.
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str1 <- "Hello"
str2 <- " World"
cat("Length:", nchar(str1), "\n")
combined <- paste0(str1, str2)
cat("Concatenated:", combined, "\n")
cat("Uppercase:", toupper(combined), "\n")
8. Basic Math / Calculator Title: Basic Math Calculator in R Example – Arithmetic Operations Description: Build a simple arithmetic calculator in R covering add, subtract, multiply, and divide using an online R compiler.
r
a <- 15.0
b <- 4.0
cat("Add: ", a + b, "\n")
cat("Subtract:", a - b, "\n")
cat("Multiply:", a * b, "\n")
cat("Divide: ", a / b, "\n")
FAQ
Q1: What is an online R compiler?
A: An online R compiler is a browser-based tool that lets you write, compile, and run R code without installing anything on your computer. It runs your code on a remote server and returns the output instantly. It's perfect for learning R, testing small programs, or sharing code snippets quickly.
Q2: Do I need to install anything to run R online?
A: No installation is required. This online R compiler runs entirely in your browser — just open the page, type your code, and hit Run. There's no need to set up a local R environment, configure a compiler, or manage dependencies.
Q3: Does this R compiler support user input (stdin)?
A: Yes, this online R compiler supports standard input (stdin), so programs that read user input will work correctly. You can type your input into the provided field before running your code. This makes it easy to test interactive R programs right in the browser.
Q4: Is this online R compiler free to use?
A: Yes, this online R compiler is completely free to use — no account or payment is needed to get started. Just visit the page and start coding immediately. It's ideal for students, hobbyists, and developers who want a quick way to run R code.
Q5: Can I save and share my R code online?
A: Yes, this online R compiler lets you save your code and generate a shareable link with a single click. Anyone with the link can view and run your R program in their browser. It's a convenient way to collaborate, get help, or showcase your work.
