The variable is assignd but never use even if it is ? Confusing

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Hello i am quite a noob at c# and i don't understand why its saying that the variable is never used even tho i am using it and it is very clear.

Does it not reac the if statment ?

  public void SetStellplatz(Fahrzeuge Anmeldung)
    {
        bool is_pkw = false;
        bool is_motorrad = false;
        bool is_lkw = false;
        int stellplatznummer; 

        if(Anmeldung is PKW)
        {
            is_pkw = true;
            stellplatznummer = GetStellplatz(1, 199);

        } else if(Anmeldung is Motorrad)
        {
            is_motorrad = true;
            stellplatznummer = GetStellplatz(200, 399);
        } else if (Anmeldung is LKW)
        {
            is_lkw = true;
            stellplatznummer = GetStellplatz(400, 599);
        }
    }

Your if statement lacks an else clause, so the variable stellplatznummer is not guaranteed to be assigned in all cases. You can fix it by including an else statement that sets the value of the variable, or by initializing the variable to a default value when you define it.

"Variable is assigned but its Value is never used" Warning, At first I thought that maybe the compiler knows something I don't know and figures the code in the if block never runs, but even if I add the  This is true even if the node is functionally identical to an existing node, even if we re-assign a node to the same variable, or even if we don’t assign it to a variable at all. In contrast, if you make a new variable and set it equal to an existing node, you are just copying the pointer to that node and nothing is added to the graph:

Your method isn't doing anything as all of your variables have local scope. Your method is equivalent to:

public void SetStellplatz(Fahrzeuge Anmeldung)
{
    if (Anmeldung is PKW)
        GetStellplatz(1, 199);
    else if (Anmeldung is Motorrad)
        GetStellplatz(200, 399);
    else if (Anmeldung is LKW)
        GetStellplatz(400, 599);
}

It seems likely some of those variables should be class fields or possibly properties.

// Private Field
private bool is_pkw = false;

// Public Property
public bool is_motorrad { get; set; } = false;

public void SetStellplatz(Fahrzeuge Anmeldung)
{
    // if some condition
    is_pkw = true;

    // if some other condition
    is_motorrad = true;
}

Incorrect 'local variable is assigned to but never used' warning with , I've noticed that "local variable 'blah' is assigned to but never used' will be and each part must be given a name, even if it goes unused. that are legally allowed by the language but pointless or likely to confuse a reader or  Declaring a variable. To use a variable, you've first got to create it — more accurately, we call this declaring the variable. To do this, we type the keyword var or let followed by the name you want to call your variable: let myName; let myAge; Here we're creating two variables called myName and myAge. Try typing these lines into your web

You create the variable stellplatznummer in that method, when the method finish the variable is destroyed because is only for that method and you never return it.

Try to say for what do you want to use that method.

    public int stellplatznummer; 
    public bool is_pkw = false;
    public bool is_motorrad = false;
    public bool is_lkw = false;

     public void SetStellplatz(Fahrzeuge Anmeldung)
    {



        if(Anmeldung is PKW)
        {
            is_pkw = true;
            stellplatznummer = GetStellplatz(1, 199);

        } else if(Anmeldung is Motorrad)
        {
            is_motorrad = true;
            stellplatznummer = GetStellplatz(200, 399);
        } else if (Anmeldung is LKW)
        {
            is_lkw = true;
            stellplatznummer = GetStellplatz(400, 599);
        }
    }

if the method SetStellplatz set stellplatznummer with the number, where do you want to use it. How you will acces to this number. And please give as the code of Anmeldung may be help.

Beside that I don't udnerstand your language but it's possible that you will not need to do a method that SetStellplatz.

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Unused local variable - Python queries, A local variable is defined (by an assignment) but never used. If the variable is included for documentation purposes or is otherwise  The information "stored" in a variable, is the last piece of information assigned to that variable name. After assigning into a variable, all previous information is lost. Note, we often use the statement "store the value 5 in X" to mean the same as "assign the value 5 to X" Back to Topics List

Algorithms and Computation: 14th International Symposium, ISAAC , Thus, we can write F as (assume that t is even, if t is odd, then we have one Otherwise we add m — n variables that are never used. Then X and Y encode the same formula and Y yields a satisfying assignment for F with weight at most k. Large-scale surveys often name their variables in this way because it is too difficult or impossible to come up with good mnemonic names for everything. But when you work with those data, typically you only use a subset of the variables that is small enough to support distinctive mnemonic variable names.

Comments
  • Assigned != Used.
  • I dont undestand. I am using the variable ? No ?
  • Which variable are you referring to?
  • ok, so is_motorrad = true. Who cares? You never use it anywhere. Why does it matter if it's true?
  • @Amy My mistakes, i am reffering to the bools.
  • This is technically true, but all four of the local variables get set and immediately thrown away. It seems likely he's missing the "bigger picture".