methodological_instructions (3)

Methodological Instructions

Theme: User functions and procedures

Aim: write code in programming language using functions and procedures

Assessment criteria

Knowledge

·     Know what is function

·     Know what is procedure

Understanding

·     Describes the difference between function and procedure

Application

·     Write code using functions

·     Write code using procedures

Analysis

·     Analyze function code

Key words and phrases:

Void, IntelliSense, procedure, function, bracket, return value

Useful expressions for dialogs and letters:

Well, there are cases when we use returning … .

For example, the IntelliSense is of considerable support when … .

Obviously, the functions and procedures are used to make  … .

Theory

A function allows you to encapsulate a piece of code and call it from other parts of your code.

If you’re familiar with Visual Basic or Pascal, notice that C# does not use different keywords to distinguish between a method that returns a value (a function) and a method that does not return a value (a procedure or subroutine).

You must always specify either a return type or void

public static void replacesign (int[] numbers, int number)
{
     for (int i=0; i<numbers.Length; i++) {
     if (numbers[i] == number) {
      numbers[i] = -numbers[i];
     }
   }
}

static void Main()
{
     int[] numbers = {12, 5, 7, 83, 5, 8, 5};
     replacesign (numbers, 5);
     for(int i=0; i<numbers.Length; i++)

     {
           Console.WriteLine(numbers[i]);
     }
}

П. Questions for self-assessment.

1)     What is the difference between procedure and function?

2)     How to call a procedure or function?

3)     How to use procedure or function?

Visual Aids and Materials links.

1.      Slides

2.      https://csharp.net-tutorials.com/basics/functions/

3.      https://docs.microsoft.com/ru-ru/dotnet/csharp/language-reference/keywords/value-types

4.      https://poisk-ru.ru/s30898t9.html

Students' Practical Activities:

Students must be able:

·     Write code using functions

·     Write code using procedures

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