Lecture 9: Control Flow 1

Info and Materials

• Date: July 24, 2025
• Topics: Writing conditionals with if, else, and else if
• Slides: View Slides
• Code: usethis::use_course("csp-materials/if-else")

Learning Objectives

• Define what control structures are and why they matter
• Introduce one type of control structure: conditional statements
• Practice using conditional statements in R

Before Class

• Review Lecture 8 materials to get ready for today’s in-class quiz
• Bring your laptop to every class

Readings

Skim the readings before or after class to get the big picture and prep for quizzes and assignments:

• Chapter 13 “Control Structures” in “R programming for Data Science” (Notice this is not our regular book!)