Function definition in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function named greet that prints "Hello!".

R Programming

greet <- function() {
  print([1])
}

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

A"Hello!"

BHello

Cprint("Hello!")

Dgreet

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the text.

Trying to print without using print() function.

The function prints the string "Hello!" using print(). The string must be in quotes.

2fill in blank

medium

Complete the code to define a function add that takes two numbers x and y and returns their sum.

R Programming

add <- function(x, y) {
  return([1])
}

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

Ax - y

Bx * y

Cx / y

Dx + y

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Forgetting to return the result.

The function should return the sum of x and y, which is x + y.

3fill in blank

hard

Fix the error in the function definition to correctly calculate the square of a number n.

R Programming

square <- function(n) {
  result <- n [1] n
  return(result)
}

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A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of * for multiplication.

Using division or subtraction operators.

To calculate the square, multiply n by itself using the * operator.

4fill in blank

hard

Fill both blanks to define a function named is_even that returns TRUE if a number num is even, otherwise FALSE.

R Programming

is_even <- function(num) {
  if (num [1] 2 == 0) {
    return([2])
  } else {
    return(FALSE)
  }
}

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

A%%

BTRUE

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of %% for modulo.

Returning FALSE when number is even.

The modulo operator %% checks remainder. If remainder is 0, number is even, so return TRUE.

5fill in blank

hard

Fill all three blanks to define a function named greet_person that takes a name and returns a greeting string like "Hello, Alice!".

R Programming

greet_person <- function([1]) {
  greeting <- paste([2], [3], sep = ", ")
  return(greeting)
}

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

Aname

B"Hello"

D"!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to include the parameter name.

Not using paste() correctly to join strings.

The function takes a parameter name, then uses paste() to join "Hello" and the name with a comma and space.