Blending data and logic

Blending data and logic#

Two different programming styles#

Imagine you want to write an application that checks if the entered food is one of the following vegetables or not:

  • carrot

  • beetroot

  • cabbage

Take 1
Console.Write(
    """
    I can help you with your diet.
    Enter the food: 
    """);
var line = Console.ReadLine();

if (line == "carrot"
    || line == "beetroot"
    || line == "cabbage")
    Console.WriteLine("✅ this is a vegetable.");
else
    Console.WriteLine("❌ I don't know what this is.");
Take 2
const string WelcomeMessage =
    """
    I can help you with your diet.
    Enter the food: 
    """;
const string YesMessage = "✅ this is a vegetable.";
const string NoMessage = "❌ I don't know what this is.";
string[] knownVegetables =
[
    "carrot",
    "beetroot",
    "cabbage"
];

Console.Write(WelcomeMessage);
var line = Console.ReadLine();

if (knownVegetables.Contains(line))
    Console.WriteLine(YesMessage);
else
    Console.WriteLine(NoMessage);

  • string[] means a collection of many strings. We will introduce this.

Activity 17

  1. Which differences do you notice regarding:

    • readability

    • structure, e.g., where which components of code is located

  2. How could this difference affect the programming experience?

Steps:

  1. 1 min think individually.

  2. 4 min discuss with your partner.

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