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This article mainly explains "how to transfer parameters by value in C#". The content of the explanation in this article is simple and clear, and it is easy to learn and understand. let's study and learn "how to transfer parameters by value" together.

Pass parameters by value

This is the default way to pass parameters. In this way, when a method is called, a new storage location is created for each value parameter.

The value of the actual parameter is copied to the parameter, which uses two different values in memory. Therefore, when the value of the parameter changes, it will not affect the value of the parameter, thus ensuring the security of the parameter data. The following example demonstrates this concept:

Using System

Namespace CalculatorApplication

{

Class NumberManipulator

{

Public void swap (int x, int y)

{

Int temp

Temp = x; / * Save the value of x * /

X = y; / * assign y to x * /

Y = temp; / * assign temp to y * /

}

Static void Main (string [] args)

{

NumberManipulator n = new NumberManipulator ()

/ * definition of local variables * /

Int a = 100

Int b = 200

Console.WriteLine ("value of a before swap: {0}", a)

Console.WriteLine ("value of b before swap: {0}", b)

/ * call the function to exchange values * /

N.swap (a, b)

Console.WriteLine ("value of an after exchange: {0}", a)

Console.WriteLine ("value of b after exchange: {0}", b)

Console.ReadLine ()

}

}

}

When the above code is compiled and executed, it produces the following results:

Before the exchange, the value of a: 100 before the exchange, the value of b: 200 after the exchange, the value of a: 100 after the exchange, the value of b: 200

The results show that even if the value is changed within the function, the value does not change at all.

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