Repeat loop with break in R Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of a repeat loop with break

What is the output of this R code using a repeat loop with a break condition?

R Programming

count <- 1
repeat {
  if (count > 3) {
    break
  }
  print(count)
  count <- count + 1
}

A

[1] 1
[1] 2
[1] 3
[1] 4

B

[1] 1
[1] 2

C

[1] 1
[1] 2
[1] 3

D Error: object 'count' not found

💡 Hint

The loop stops when count becomes greater than 3.

The repeat loop prints count starting at 1 and increments it. When count becomes 4, the break stops the loop, so only 1, 2, and 3 are printed.

❓ Predict Output

intermediate

Repeat loop with break and condition

What will this R code print?

R Programming

x <- 10
repeat {
  x <- x - 3
  if (x <= 0) {
    break
  }
  print(x)
}

A

[1] 7
[1] 4
[1] 1

B

[1] 7
[1] 4
[1] 1
[1] -2

C Error: object 'x' not found

D

[1] 7
[1] 4

💡 Hint

The loop subtracts 3 from x each time and prints x only if it is greater than 0.

x starts at 10, then becomes 7, 4, 1. When x becomes -2, the break stops the loop before printing.

🔧 Debug

advanced

Identify the error in this repeat loop

What error does this R code produce?

R Programming

i <- 1
repeat {
  print(i)
  if (i == 5)
    break
  i <- i + 1
}

A No error, prints numbers 1 to 5

B SyntaxError: unexpected end of input

C Error: object 'i' not found

D Warning: infinite loop detected

💡 Hint

Check if the break statement is correctly placed without braces.

In R, if the if statement has only one line, braces are optional. The code runs fine and prints 1 to 5.

❓ Predict Output

advanced

Repeat loop with nested break

What is the output of this R code with nested repeat loops and break?

R Programming

outer <- 1
repeat {
  inner <- 1
  repeat {
    print(paste(outer, inner))
    if (inner == 2) {
      break
    }
    inner <- inner + 1
  }
  if (outer == 3) {
    break
  }
  outer <- outer + 1
}

A Error: object 'inner' not found

B

"1 1"
"1 2"
"2 1"
"2 2"

C

"1 1"
"2 1"
"3 1"

D

"1 1"
"1 2"
"2 1"
"2 2"
"3 1"
"3 2"

💡 Hint

The inner loop breaks when inner equals 2, the outer loop breaks when outer equals 3.

The code prints pairs of outer and inner values. Inner runs from 1 to 2 for each outer from 1 to 3.

🧠 Conceptual

expert

Behavior of break in repeat loops

Which statement about the break statement in R's repeat loops is TRUE?

A break can only be used with for loops, not repeat loops

B break exits only the innermost repeat loop it is called in

C break pauses the loop and resumes after a condition is met

D break exits all nested repeat loops immediately

💡 Hint

Think about nested loops and how break affects them.

In R, break exits only the loop where it is called, not outer loops.