W3 Schools Ruby/R

Which operator can be used to compare two values?

==

How do you insert COMMENTS in R code?

# This is a comment

Which function can be used to create a data frame?

data.frame()

Which function is used to find the amount of rows and columns in an array?

dim()

How do you call a function in R?

my_function()

Which statement is used to stop a loop?

break

Which function can be used to return the square root of a number?

sqrt()

How do you create a variable named x with the numeric value 5?

x <- 5

What is a correct syntax to output "Hello World" in R?

All of the other answers are correct ('Hello World', print("Hello World"), "Hello World")

In R, you must declare the data type of a variable

False

R is an alias of React

False

What will the following function do with the str string: nchar(str)

Find the number of characters in the str string

Which operator is used to add together two values?

The + sign

Which function is used to add additional columns in a matrix?

cbind()

What is the correct way to create a vector of strings?

fruits <- c("banana", "apple", "orange")

What is the correct way to create a list of strings?

fruits <- list("banana", "apple", "orange")

How do you start writing an if statement in R?

if (x > y)

How do you create a function in R?

my_function <- function()

The following values: 10.5, 55 and 787, belongs to which data type?

numeric

Which function is often used to concatenate elements?

paste()

Which function is used to draw points (markers) in a diagram?

plot()

How can you assign the same value to multiple variables in one line?

var1 <- var2 <- var3 <- "Orange"

How do you start writing a while loop in R?

while (x < y)

The value of a string variable can be surrounded by single quotes.

True

Consider the following code: for (x 1:10). Which keyword is missing inside the for loop to output the numbers 1 to 10?

in