Why Ruby has multiple control flow styles - See It in Action

Explore Ruby's Multiple Control Flow Styles

📖 Scenario: Imagine you are building a simple program that decides what to do based on the weather. Ruby lets you choose different ways to write these decisions, called control flow styles.

🎯 Goal: You will create a small Ruby program that uses different control flow styles to print messages based on the weather condition.

📋 What You'll Learn

Create a variable called weather with the value "sunny"

Create a variable called temperature with the value 25

Use an if-elsif-else statement to print a message based on weather

Use a case statement to print a message based on temperature

Use a ternary operator to print a short message based on temperature

💡 Why This Matters

🌍 Real World

Control flow helps programs make decisions like choosing what to do based on user input or data, just like deciding what to wear based on the weather.

💼 Career

Understanding different control flow styles in Ruby is important for writing clear and efficient code in web development, automation, and scripting jobs.

1

Set up weather and temperature variables

Create a variable called weather and set it to "sunny". Also create a variable called temperature and set it to 25.

Ruby

# Create variables weather and temperature
# Your code here

Need a hint?

Use = to assign values to variables.

2

Use if-elsif-else to check weather

Use an if-elsif-else statement with the variable weather to print "It's a bright day!" if weather is "sunny", print "Looks like rain." if weather is "rainy", and print "Weather is unusual." otherwise.

Ruby

weather = "sunny"
temperature = 25

# Use if-elsif-else to print message based on weather
# Your code here

Need a hint?

Use if, elsif, and else keywords with puts to print messages.

3

Use case statement to check temperature

Use a case statement with the variable temperature to print "It's cold." if temperature is less than 10, print "Nice weather." if temperature is between 10 and 30 (inclusive), and print "It's hot!" otherwise.

Ruby

weather = "sunny"
temperature = 25

if weather == "sunny"
  puts "It's a bright day!"
elsif weather == "rainy"
  puts "Looks like rain."
else
  puts "Weather is unusual."
end

# Use case statement to print message based on temperature
# Your code here

Need a hint?

Use case with ranges like 0..9 and 10..30 to check temperature.

4

Use ternary operator for temperature check

Use a ternary operator with the variable temperature to print "Warm day" if temperature is greater than 20, otherwise print "Cool day".

Ruby

weather = "sunny"
temperature = 25

if weather == "sunny"
  puts "It's a bright day!"
elsif weather == "rainy"
  puts "Looks like rain."
else
  puts "Weather is unusual."
end

case temperature
when 0..9
  puts "It's cold."
when 10..30
  puts "Nice weather."
else
  puts "It's hot!"
end

# Use ternary operator to print message based on temperature
# Your code here

Need a hint?

Use puts condition ? 'Warm day' : 'Cool day' to print based on temperature.