Switch statement in R Programming - Mini Project: Build & Apply

Using Switch Statement in R

📖 Scenario: You are creating a simple program to convert a number representing a day of the week into the day's name. This is useful for apps that show schedules or reminders.

🎯 Goal: Build a program that uses the switch() statement in R to print the correct day name for a given day number.

📋 What You'll Learn

Create a variable day_number with a value from 1 to 7

Create a variable default_day with the value "Invalid day"

Use the switch() function with day_number to assign the correct day name to day_name

Print the value of day_name

💡 Why This Matters

🌍 Real World

Switch statements help programs choose actions based on user input or data, like showing the correct day name for a calendar app.

💼 Career

Understanding switch statements is useful for writing clear and efficient code in data analysis, reporting, and software development.

1

Create the day number variable

Create a variable called day_number and set it to 3.

R Programming

# Create a variable called day_number and set it to 3
# Your code here

Need a hint?

Use the assignment operator <- to assign the value 3 to day_number.

2

Create the default day variable

Create a variable called default_day and set it to the string "Invalid day".

R Programming

day_number <- 3
# Create a variable called default_day and set it to "Invalid day"
# Your code here

Need a hint?

Remember to use quotes around the string value.

3

Use switch() to assign the day name

Use the switch() function with day_number to assign the correct day name to a variable called day_name. Use these mappings: 1 = "Monday", 2 = "Tuesday", 3 = "Wednesday", 4 = "Thursday", 5 = "Friday", 6 = "Saturday", 7 = "Sunday". Use default_day as the default value if day_number is not 1 to 7.

R Programming

day_number <- 3
default_day <- "Invalid day"
# Use switch() with day_number to assign day_name
# Your code here

Need a hint?

Convert day_number to a character string inside switch() because switch() matches strings in R.

4

Print the day name

Print the value of the variable day_name.

R Programming

day_number <- 3
default_day <- "Invalid day"
day_name <- switch(as.character(day_number),
                   "1" = "Monday",
                   "2" = "Tuesday",
                   "3" = "Wednesday",
                   "4" = "Thursday",
                   "5" = "Friday",
                   "6" = "Saturday",
                   "7" = "Sunday",
                   default_day)
# Print day_name
# Your code here

Need a hint?

Use the print() function to show the value of day_name.