Conditional Statements

1. Write an if statement to select between expressions based on a condition.
2. Use the correct syntax for an if statement in R.
3. Given the components of a condition and an if statement, determine the output produced by R.
4. Write a “compound” condition using the comparison and logical operators.
5. Use the “twin” logical operators && and || to construct a condition.
6. Explain what it means that the “twin” logical operators evaluate lazily.
7. Write if, if-else, and if-else if-else statements.

Iteration

for

1. Explain how a for loop can simplify code.
2. Write a for loop to perform an indicated sequence of commands in R.
3. Use the correct syntax for a for loop in R.
4. Given a for loop, determine the outputs stored in each variable within the loop after the loop has completed.

while

1. Explain how a while loop differs from a for loop.
2. Write a while loop to perform an indicated sequence of commands in R.
3. Use the correct syntax for a while loop in R.
4. Given a while loop, determine the outputs stored in each variable within the loop after the loop has terminated.
5. Describe situations where a while loop or for loop is preferred.
6. Use show to make the innards of a loop transparent.

Vectorization

1. Explain what it means for a function to be vectorized.
2. Describe the benefits of using vectorized functions.