Hello World in R Programming

When we start to learn any programming languages we do follow a tradition to begin HelloWorld as our first basic program. Here we are going to learn that tradition. An interesting thing about R programming is that we can get our things done with very little code.

Before we start to learn to code, let’s see the process of where to download the needed Softwares and programs.

  • Go to the official site of R programming and download R for windows(or Mac).
  • Install IDE like Rstudio, RTVS, StatET for running programs(you can download Rstudio here).We can write and run programs in IDE, but you have to download R before installing IDE.

HelloWorld Program

For the HelloWorld program, we just need a print function. No need of any packages or main functions, just a simple print function is enough.

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print("HelloWorld")

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Output:

"HelloWorld" 

print() is a function which is used to print the values on to the output screen. It also has arguments, we can use it if needed. For example, in the above program, the output is printed with quotes by default we can remove it if needed.



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print("HelloWorld", quote=FALSE)

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Output:

HelloWorld  

We passed the argument named quote in print function which value is set to be false to remove the quotes.

Different ways to run a R program

There are many ways to run an R program:

  • Method 1: Using command prompt or terminal

    Write your code in notepad or any text editor, save it as “helloworld.r”,
    helloworld-in-R-01

    helloworld Program in text editor
     
    Run it in command prompt or terminal using the command “Rscript helloworld.r”.

    helloworld-in-R-02

    compiling the program

  • Method 2: Using an online IDE
    There are many online IDEs(click here) available. We can use that without the need of installing or downloading anything.
  • Method 3: Using IDE like Rstudio, RTVS, StatET
    You can download and install these IDE in your system and can write and run the program there. Rstudio & statET(Eclipse software)is available for Windows, Mac, and Linux. RTVS presently available only on windows.
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