Basic Syntax in R

 

R Basic Syntax

R basic syntax | how to run r script | how to make comment in R | introduction to R | R programming language | how to Run R using command prompt | how to run R script. | R basics

 

Hello friends in this tutorial we are going to check out the basic syntax of R programming language. After completing this tutorial you are get to know:

• How to Run R from command prompt
• How to handle basic operations in R
• How to print values and strings in R
• How to handle comments in R
• how to create and save R script file

so lets get started.

Note: we assumed that you have installed R to your system and setup enviornment variable successfully.

R Command Prompt:

once you installed R to your system and setup the environment successfully so can run it from your command line window by given a simple command “R”. this command will execute and take you to the R environment.

so as you can see in above screen shot we given command R to our Terminal same you can give in your windows DOS, as well as you can see how R window in command prompt looks like.

Basic Working in R:

So now you ran R to your terminal now you can make basic operations like arithmetic  operations or print any string value simply. Check the below screen:

in above screen we performed basic arithmetic operations and printed strings as well you can try by your own.

Comments in R:

Comments are very useful for developers and users to make their code understandable. Comments can be place in R code or scripts which are present in your code file but not executable.

You can execute comment by given a “#” in front of any line of your document.

Example:

#This is a comment in R

R does not execute multi-line comment but the trick you can use to execute is:

#Trick for multi-line comment

if(FALSE) {

"This is a simple trick

for using multiline comment in R "

}

R Script File:

So now at last not least we will create a R script file. R script file uses the extension “.R” so whenever you are going to save you R file use “yourFileNameHere.R” to create a R script file.

To create a R file you can open any of your favorite text editor and start creating your code. A simple example given below:

 

once you are done with your program save your file with “.R” extention as shown below:

now you can run your R script directly from your command prompt or terminal window. To execute your R file give the command:

$Rscript filename.R

Note: be sure you are in same directory where you save your file or give the same path to execute.

Check the below image:

so as shown in above image you can run your R file.

At last we covered below topics hope you can able to answer anyone about below queries:

• How to Run R from command prompt
• How to handle basic operations in R
• How to print values and strings in R
• How to handle comments in R
• how to create and save R script file

You can download install and run Rstudio IDE to run R directly without command prompt or terminal with Graphical view.

Read More:

• Introduction to Scripting Language
  
• Basic Linux Commands
  
• How to create 3-D Flip Card using HTML and CSS
  

Hope you enjoyed this tutorial. We will get back to you with another R tutorial soon.

 

Feel free to leave your valuable comments below.

 

Thank you