Arithmetic operators in R Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of mixed arithmetic operations

What is the output of this R code snippet?

R Programming

result <- 5 + 3 * 2^2 - 4 / 2
print(result)

A [1] 11

B [1] 12

C [1] 14

D [1] 15

💡 Hint

Remember the order of operations: exponentiation, multiplication/division, addition/subtraction.

The expression evaluates as 5 + 3 * (2^2) - 4 / 2 = 5 + 3 * 4 - 2 = 5 + 12 - 2 = 15.

❓ Predict Output

intermediate

Result of integer division and modulus

What is the output of this R code?

R Programming

a <- 17
b <- 5
cat(a %/% b, a %% b)

A 3 2

B 2 3

C 3 3

D 2 2

💡 Hint

Integer division %/% gives quotient, modulus %% gives remainder.

17 divided by 5 is 3 with remainder 2, so output is '3 2'.

🔧 Debug

advanced

Identify the error in arithmetic expression

What error does this R code produce?

R Programming

x <- 10
y <- 0
z <- x / y
print(z)

A [1] Inf

B NaN

C Error: division by zero

D 0

💡 Hint

Check how R handles division by zero with numeric values.

In R, dividing a positive number by zero returns Inf (infinity), not an error.

❓ Predict Output

advanced

Output of combined arithmetic and logical operators

What is the output of this R code?

R Programming

a <- 4
b <- 2
result <- (a > b) + (b == 2) * 3
print(result)

A [1] 5

B [1] 3

C [1] 4

D [1] 1

💡 Hint

Logical TRUE is 1 and FALSE is 0 in arithmetic operations.

a > b is TRUE (1), b == 2 is TRUE (1), so result = 1 + 1*3 = 4.

🧠 Conceptual

expert

Number of elements in a vector after arithmetic recycling

Given the code below, how many elements does the resulting vector have?

R Programming

v1 <- c(1, 2, 3, 4, 5)
v2 <- c(10, 20)
result <- v1 + v2

A 2

B 5

C 10

D Error due to length mismatch

💡 Hint

R recycles shorter vectors to match the length of longer vectors.

v2 is recycled to length 5: (10,20,10,20,10), so result length is 5.