What is the difference between ref and out keywords?

Here is the difference between the ref and out keywords in C#:

ref keyword

• The ref keyword is used to pass an argument to a method by reference.
• The variable passed to the method using ref must be initialized before passing it to the method.
• The method can read and modify the value of the variable passed using ref.
• The changes made to the variable inside the method are reflected in the original variable outside the method.

Example:

int x = 5;
DoubleValue(ref x);
Console.WriteLine(x); // Output: 10

out keyword

• The out keyword is also used to pass an argument to a method by reference.
• The variable passed to the method using out does not need to be initialized before passing it to the method.
• The method must assign a value to the variable passed using out before returning.
• The changes made to the variable inside the method are reflected in the original variable outside the method.

Example:...