what are the uses of static variables in a program

Question

help me!!

Answer 1

A static variable shares the value of it among all instances of the class.

Example without declaring it static:

public class Variable
{
public int i = 5;
public void test()
{
i = i + 5;
Console.WriteLine(i);
}
}

public class Exercise
{
static void Main()
{
Variable var = new Variable();
var.test();
Variable var1 = new Variable();
var1.test();
Console.ReadKey();
}
}

Explanation: If you look at the above example, I just declare the int variable. When I run this code the output will be 10 and 10. Its simple.

Now let's look at the static variable here; I am declaring the variable as a static.

Example with static variable:

public class Variable
{
public static int i = 5;
public void test()
{
i = i + 5;
Console.WriteLine(i);
}
}

public class Exercise
{
static void Main()
{
Variable var = new Variable();
var.test();
Variable var1 = new Variable();
var1.test();
Console.ReadKey();
}
}

Now when I run above code, the output will be 10 and 15. So the static variable value is shared among all instances of that class.

Answer 2

static variables will be assigned with some constant values. so the memory allocated to these variables will be same throughout the program

Answer 3

thanks !!