Functions in C# full Explanation
In C#, functions, also known as methods, are blocks
of code that perform specific tasks and can be called and executed as needed.
Functions allow you to encapsulate reusable code, enhance code organization,
and promote code reusability. Here's a full explanation of functions in C#:
1.
Function Signature:
v A
function signature consists of the function name and the parameters it accepts.
v The
function signature defines the unique identifier for the function.
v Example:
`public int Add(int a, int b)`
2.
Return Type:
v The
return type specifies the type of value that the function will return upon
completion.
v If
the function doesn't return a value, the return type is specified as `void`.
v Example:
`public int Add(int a, int b)`
3.
Parameters:
v Parameters
are placeholders for values that are passed into the function when it is
called.
v They
define the inputs to the function and allow you to pass data to the function
for processing.
v Parameters
can have Different types and can be optional or have default values.
v Example:
`int a, int b`
4.
Method Body:
v The
method body contains the code that is executed when the function is called.
v It
consists of a set of statements enclosed within curly braces `{ }`.
v The
statements define the actions and calculations performed by the function.
v Example:
public int Add(int a, int b)
{
int sum = a + b;
return sum;
}
5.
Method Invocation:
v To
execute a function and invoke its functionality, you need to call the function.
v The
function is called by using its name followed by parentheses `()`.
v Arguments
can be passed to the function within the parentheses.
v Example:
`int result = Add(5, 3);`
6.
Method Overloading:
v Method
overloading allows you to define multiple methods with the same name but Different
parameters.
v The
compiler determines which overloaded method to invoke based on the number and
types of arguments provided.
v Example:
public int Add(int a, int b)
{
return a + b;
}
public double Add(double a, double b)
{
return a + b;
}
7.
Access Modifiers:
v Access
modifiers such as `public`, `private`, `protected`, etc., control the
visibility and accessibility of the function.
v They
determine from where the function can be called.
v Example:
`public int Add(int a, int b)`
8.
Recursive Functions:
v Recursive
functions are functions that call themselves within their own definition.
v They
are useful for solving problems that can be naturally divided into smaller
sub-problems.
v Example:
public int Factorial(int n)
{
if (n == 0)
return 1;
else
return n * Factorial(n - 1);
}
Functions in C# provide a modular and reusable way
to define and execute code blocks. They allow you to break down complex tasks
into smaller, manageable units and promote code organization and reusability.
By understanding the concept of functions, you can write more structured and
modular code in your C# programs.
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