Introduction to Functions in C#

Prologue to Functions in C# In C#, a capacity is a method of bundling code that accomplishes something and afterward restores the value. Unlike in C, C and some different dialects, capacities don't exist without anyone else. They are a piece of an item situated way to deal with programming. A program to oversee spreadsheets may incorporate an entirety() work as a major aspect of an item, for instance. In C#, a capacity can be known as a part work it is an individual from a class-however that phrasing is left over from C. The typical name for it is a technique. The Instance Method There are two sorts of techniques: case strategy and static technique. This presentation covers the occasion technique. The model underneath characterizes a basic class and calls it Test. This model is a basic comfort program, so this is permitted. As a rule, the top of the line characterized in the C# record must be the structure class. Its conceivable to have a vacant class like this class Test { }, however it isnt helpful. In spite of the fact that it looks vacant, it-like all C# classes-acquires from the Object that contains it and incorporates a default constructorâ in the primary program. var t new Test(); This code works, however it wont do anything when run with the exception of make an example t of the vacant test class. The code beneath includes a capacity, a strategy that yields the word Hello. utilizing System;namespace funcex1{class Test{public void SayHello(){Console.WriteLine(Hello) ;}}class Program{static void Main(string[] args){var t new Test() ;t.SayHello() ;Console.ReadKey() ;}}} This code model incorporates Console.ReadKey(), so when it runs, it shows the support window and anticipates a key section, for example, Enter, Space or Return (not the move, Alt or Ctrl keys). Without it, it would open the comfort Window, yield Hello and afterward close all quickly. The capacity SayHello is about as straightforward a capacity as you can have. Its an open capacity, which implies the capacity is obvious from outsideâ the class. In the event that you expel the word open and attempt to aggregate the code, it falls flat with an assemblage mistake funcex1.test.SayHello() is out of reach because of its security level. On the off chance that you include the word private where the word open was and recompile, you get the equivalent gather mistake. Simply transform it back to open. The word void in the capacity implies that the capacity doesn't restore any qualities. Run of the mill Function Definition Characteristics Access level: open, private in addition to some othersReturn esteem: void or any sort, for example, intMethod Name: SayHelloAny technique boundaries: none for the time being. These are characterized in the sections () after the technique name The code for the meaning of another capacity, MyAge(), is: open int MyAge(){return 53;} Include that directly after the SayHello() technique in the primary model and include these two lines before Console.ReadKey(). var age t.MyAge();Console.WriteLine(David is {0} years old,age); Running the program currently yields this: Hi David is 53 years of age, The var age t.MyAge(); call to the strategy restored the worth 53. Its not the most valuable capacity. A progressively helpful model is the spreadsheet Sum work with a variety of ints, the beginning file and the quantity of qualities to total. This is the capacity: open buoy Sum(int[] values, int startindex, int endindex){var all out 0;for (var indexstartindex; indexendindex; index){total values[index];}return total;} Here are three use cases. This is the code to include Main() and call to test the Sum work. var esteems new int[10] {1, 2, 3, 4, 5, 6, 7, 8, 9,10};Console.WriteLine(t.Sum(values,0,2));/Should be 6Console.WriteLine(t.Sum(values,0,9));/ought to be 55Console.WriteLine(t.Sum(values,9,9));/ought to be 10 as ninth worth is 10 The For circle includes the qualities in the range startindex to endindex, so for startindex 0 and endindex2, this is the whole of 1 2 3 6. While for 9,9, it just includes the one values[9] 10. Inside the capacity, the nearby factor all out is introduced to 0 and afterward has the applicable pieces of the cluster esteems included.