C#•11mo ago

Just a random question

I'm not trying to solve a problem, rather I am looking for specific words to expand my C# vocabulary. What did I do from line 11 through 15? Is that what you call an instance of an object? Normally, I instantiate objects by doing this: Type name = new Type(); but I'm not entirely sure what you call what I did from line 11 through 15.

6 Replies

Angius•11mo ago

You declared fields Private fields, to be more precise Each and every one of them being, most probably, null Or default

AselaOP•11mo ago

Ahh But they are first initialised in the Start method right?

Angius•11mo ago

Yes, that's where you initialize them

AselaOP•11mo ago

Sweet, thanks

i like chatgpt•11mo ago

Declaration Without Initialization

class User
{
    // (instance) field declaration without initialization
    // they are automatically assigned a default value
    // 0 for int
    // null for string
    // false for bool
    public int Age;
    public string Name;
    public bool IsActive;

    public void Print()
    {
        // local variable declaration without initialization
        // they are unassigned, you must assign them manually.

        int foo;
        string bar;
        bool baz;
    }
}

class User
{
    // (instance) field declaration without initialization
    // they are automatically assigned a default value
    // 0 for int
    // null for string
    // false for bool
    public int Age;
    public string Name;
    public bool IsActive;

    public void Print()
    {
        // local variable declaration without initialization
        // they are unassigned, you must assign them manually.

        int foo;
        string bar;
        bool baz;
    }
}

Initialization Order

var user = new User { Age = 30 /* third */ };
Console.WriteLine(user.Age); 
// output: 30
// initialization order:
// 1. instance field initializer
// 2. constructor
// 3. object initializer
// for the following example, 20 overwrites 10 and 30 overwrites 20, so the output becomes 30.
class User
{
    public int Age = 10; // first

    public void Print()
    {
        Age = 20; // second
    }
}

var user = new User { Age = 30 /* third */ };
Console.WriteLine(user.Age); 
// output: 30
// initialization order:
// 1. instance field initializer
// 2. constructor
// 3. object initializer
// for the following example, 20 overwrites 10 and 30 overwrites 20, so the output becomes 30.
class User
{
    public int Age = 10; // first

    public void Print()
    {
        Age = 20; // second
    }
}

The complete order list (when you class inherits from another class, has static field, etc): 1. Static fields 2. Static constructor 3. Instance fields 4. Base static fields 5. Base static constructor 6. Base instance fields 7. Base constructor 8. Constructor 9. Object initializer.

AselaOP•11mo ago

Thanks!

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Just a random question