First R program in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, world!" in R.

R Programming

print([1])

Drag options to blanks, or click blank then click option'

Aprint("Hello, world!")

BHello, world!

C'Hello, world!'

D"Hello, world!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the text

Putting the whole print statement inside print()

In R, to print text, you use the print() function with the text inside quotes.

2fill in blank

medium

Complete the code to assign the number 10 to a variable named x.

R Programming

x [1] 10

Drag options to blanks, or click blank then click option'

A==

B=

C<-

D->

Attempts:

3 left

💡 Hint

Common Mistakes

Using == which is for comparison

Using -> which assigns in the opposite direction

In R, the preferred way to assign a value to a variable is using the <- operator.

3fill in blank

hard

Fix the error in the code to print the value of variable y.

R Programming

y <- 5
print([1])

Drag options to blanks, or click blank then click option'

Ay

B"y"

Cprint(y)

DY

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around y

Using uppercase Y instead of y

Putting print() inside print()

To print the value of y, just put y inside print(). Quotes would print the letter y, not its value.

4fill in blank

hard

Fill both blanks to create a vector of numbers from 1 to 5 and print it.

R Programming

numbers <- c([1])
print([2])

Drag options to blanks, or click blank then click option'

A1, 2, 3, 4, 5

Bnumbers

Cc(1, 2, 3, 4, 5)

D1:5

Attempts:

3 left

💡 Hint

Common Mistakes

Putting c() inside the print statement

Printing the vector creation expression instead of the variable

The c() function combines values into a vector. We assign it to 'numbers' and then print 'numbers'.

5fill in blank

hard

Fill all three blanks to create a sequence from 1 to 10, filter even numbers, and print them.

R Programming

seq <- [1]
even_nums <- seq[seq [2] 2 == 0]
print([3])

Drag options to blanks, or click blank then click option'

A1:10

B%%

Ceven_nums

D%/%

Attempts:

3 left

💡 Hint

Common Mistakes

Using %/% which is integer division

Printing the original sequence instead of filtered even numbers

1:10 creates a sequence from 1 to 10. The modulo operator %% checks for even numbers. We print the filtered vector.