Hi everyone, This article will share examples of R code and all the basics in R. So, if you are interested in this topic, follow the example below.

**Examples of R Comments**

First, we will learn about comments in R.

Comments are denoted by a ‘# ‘. R ignores code that begins with a # when running it.

Before each line of code in this example, a remark is used:

# This line is a comment cat("Hello, learnshare IT.\n")

Output

`Hello, learnshare IT.`

If you want to know more about this comment, click **here****.**

**Examples of R Variables**

Data values are kept in variables as storage.

There needs to be a command in R for declaring variables. When a variable is initially given a value, it is considered to have been formed. Use the ‘<-‘ symbol to give a variable a value. Input the variable name to output (or print) the value:

# Create a name variable str <- "I love LearnShare IT" # View a result str

Output

`[1] "I love LearnShare IT"`

**Examples of R Numbers**

R offers three different number types: numeric, integer, and complex.

When you give them a value, number-type variables are created:

x <- 2.8 # numeric y <- 5L # integer z <- 3i # complex

**Examples of R Strings**

Text is stored using strings.

Either single quotation marks or double quotation marks are used to enclose a string:

“IT” is equivalent to ‘IT’:

x <- "IT" x1 <- "IT" # View a result x x1

Output

```
[1] "IT"
[1] "IT"
```

**Examples of R Operators**

Operations on variables and values are carried out using operators.

See the example below

x <- 10 y <- 3 # Add operator x + y # 13 # Subtract operator x - y # 7 # Divide operator x %/% y # 3 # Divide by the remainder operator x %% y # 1

Output

```
[1] 13
[1] 7
[1] 3
[1] 1
```

**Examples of R If…Else**

Here, we will If…else to print the max number. Follow the code example below:

x <- 10 y <- 5 if (x < y) { y } else { x }

Output

`[1] 10`

**Examples of R While Loop**

Below is an example of While Loop basic in code in R to calculate the sum from 1 to 5.

i <- 1 res <- 0 while (i <= 5) { res <- res + i i <- i + 1 } # View a result res

Output

`[1] 15`

**Examples of R For Loop**

For iterating through a series, we also use a for loop to calculate the sum from 1 to 5 as follows

res <- 0 for (i in 1:5) { res <- res + i } # View a result res

Output

`[1] 15`

**Examples of R Functions**

A block of code known as a function only executes when invoked.

Data that you supply to a function are referred to as parameters.

A function may return data as a result. Check out the code example below

res <- 0 # Create a function cal_sum <- function(n) { for (i in 1:n) { res <- res + i } return(res) } # View a result cal_sum(5)

Output

`[1] 15`

**Summary**

In conclusion, we will learn about R code examples and hope you can code the basics in R after the examples above. So, if you have any questions, don’t hesitate to comment below. Thanks for reading!

Have a great day!

Hi, guys! My name’s Scott Miller. My current job is a software developer and I have shared a lot of quality articles about Javascript, C, C++, C#, Python, PHP, R, Java programming languages. I’m hoping they can assist you.

**Name of the university: **HCMUS

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