If-else statements in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Positive" if x is greater than 0.

R Programming

x <- 5
if (x [1] 0) {
  print("Positive")
}

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' will check if x is less than 0, which is wrong here.

The condition x > 0 checks if x is greater than zero.

2fill in blank

medium

Complete the code to print "Even" if number is divisible by 2.

R Programming

number <- 4
if (number %% 2 [1] 0) {
  print("Even")
}

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

A<

B!=

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' will check if remainder is not zero, which is incorrect for even numbers.

The expression number %% 2 == 0 checks if number is divisible by 2 without remainder.

3fill in blank

hard

Fix the error in the if-else statement to print "Positive" or "Non-positive".

R Programming

x <- -3
if (x [1] 0) {
  print("Positive")
} else {
  print("Non-positive")
}

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

A==

B>

C<-

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' or '<-' inside the if condition causes syntax errors.

The condition should use the greater than operator > to check if x is positive.

4fill in blank

hard

Fill in the blank to print "Adult" if age is 18 or more, otherwise "Minor".

R Programming

age <- 20
if (age [1] 18) {
  print("Adult")
} else {
  print("Minor")
}

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

A>

B<

C<=

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' in the if condition would reverse the logic.

The condition age >= 18 checks if age is 18 or older. The else covers the case when age is less than 18.

5fill in blank

hard

Fill in the blanks to print "Positive", "Zero", or "Negative" based on x value.

R Programming

x <- 0
if (x [1] 0) {
  print("Positive")
} else if (x [2] 0) {
  print("Zero")
} else {
  print("Negative")
}

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

A>

B==

C<

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>=' instead of '>' in the first condition can cause wrong output.

The first condition checks if x is greater than zero (positive). The second checks if x equals zero. Otherwise, x is negative.