assansav / programming-univbasics-3-methods-default-values-lab-online-web-prework

Meal Choice Lab

Learning Goals

• Define a method that takes in required and optional arguments
• Use puts to output a string
• Define a return value

Introduction

We've demonstrated the basics of defining methods, printing output, and returning values. Let's combine the concepts we've shown you to create a "Meal Choice" in our Ruby program.

Define a Method that Takes in Required and Optional Arguments

We're attending a wedding and the newlyweds-to-be want to know what types of food they should provide at the banquet. Define a method named meal_choice that has three parameters:

• Two required parameters for vegetables. Ex: veg1 and veg2
• And an optional parameter for protein with a default value of meat

You should write your code in the file lib/meal_choice.rb.

Use puts to Output a String

Whether you're omnivorous, vegetarian, or vegan, you're going to be eating a nutritious meal!

• First, in the body of your method, have the program puts "What a nutritious meal!"
• Next, let's also have it puts "A plate of #{protein} with #{veg1} and #{veg2}." so that you can also see what you've ordered.

Top Tip: Remember, that puts has a return value of nil, so we need to give our method an explicit return value.

Define a Return Value

The hosts are going the meal information to keep track of what everyone is eating, so make sure the return value includes the three food items you've chosen by returning: "A plate of #{protein} with #{veg1} and #{veg2}."

Note: An explicit or implicit return can be used.

Conclusion

You're all set! You've successfully written a series of Ruby methods utilizing all of the various Ruby basics we've discuss thus far. Now, we'll teach you about scope, and how information can be passed around to different methods.