Comparison operators in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if x is equal to 10.

R Programming

x <- 10
result <- x [1] 10
print(result)

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

A=

B!=

C<-

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using = instead of == for comparison.

Using <- which is for assignment, not comparison.

In R, == is used to compare if two values are equal.

2fill in blank

medium

Complete the code to check if y is greater than 5.

R Programming

y <- 7
if (y [1] 5) {
  print("y is greater than 5")
}

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of >.

Using == which checks equality, not greater than.

The operator > checks if the left value is greater than the right value.

3fill in blank

hard

Fix the error in the code to check if z is not equal to 0.

R Programming

z <- 3
if (z [1] 0) {
  print("z is not zero")
}

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

A<

B==

C!=

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using = which is for assignment, not comparison.

Using == which checks equality, not inequality.

The operator != means 'not equal to' in R.

4fill in blank

hard

Complete the code to create a dictionary of words and their lengths, but only for words longer than 3 letters.

R Programming

words <- c("cat", "house", "dog", "elephant")
lengths <- list()
for (word in words) {
  if (nchar(word) [1] 3) {
    lengths[[word]] <- nchar(word)
  }
}

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

A>

B<

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > in the condition.

Adding an operator when assigning the length.

The condition nchar(word) > 3 selects words longer than 3 letters. The {{BLANK_2}} is empty because we just assign the length.

5fill in blank

hard

Fill both blanks to create a named list of uppercase words and their lengths, only if length is at least 4.

R Programming

words <- c("tree", "sun", "flower", "sky")
result <- list()
for (w in words) {
  if (nchar(w) [1] 3) {
    result[[[2]]] <- nchar(w)
  }
}

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

A>

Btoupper(w)

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > in the condition.

Not converting the word to uppercase for the name.

Adding an operator when assigning the length.

The condition nchar(w) > 3 filters words with length at least 4. The name uses toupper(w) to uppercase the word. No operator is needed when assigning the length.