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How to define methods in C#?
A method is a group of statements that together perform a task. Every C# program has at least one class with a method named Main.
When you define a method, you basically declare the elements of its structure. The syntax for defining a method in C# is as follows −
<Access Specifier> <Return Type> <Method Name>(Parameter List) {
Method Body
}Here,
Access Specifier − This determines the visibility of a variable or a method from another class.
Return type − A method may return a value. The return type is the data type of the value the method returns. If the method is not returning any values, then the return type is void.
Method name − Method name is a unique identifier and it is case sensitive. It cannot be same as any other identifier declared in the class.
Parameter list − Enclosed between parentheses, the parameters are used to pass and receive data from a method. The parameter list refers to the type, order, and number of the parameters of a method. Parameters are optional; that is, a method may contain no parameters.
Method body − This contains the set of instructions needed to complete the required activity.
The following is an example of methods showing how to find that a string has unique words or not. Here, we have created a C# method CheckUnique() −
Example
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
public class Demo {
public bool CheckUnique(string str) {
string one = "";
string two = "";
for (int i = 0; i < str.Length; i++) {
one = str.Substring(i, 1);
for (int j = 0; j < str.Length; j++) {
two = str.Substring(j, 1);
if ((one == two) && (i != j))
return false;
}
}
return true;
}
static void Main(string[] args) {
Demo d = new Demo();
bool b = d.CheckUnique("amit");
Console.WriteLine(b);
Console.ReadKey();
}
}Output
True
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