Functions in Typescript

Functions

- Particular Business Logic called as Function.

- Functions are used to reuse the business logic.

- We can Declare the Functions with the help of "function" keyword.

- We Have Two Types of Functions.

1) Named functions

2) Anonymous Functions

Named functions
---------------
- The Function with the name called as Named function.


Syntax.
-------

function definition
-------------------
function function_name([arguments with datatype]):return type{

//Business Logic

}

//function calling
function_name();


Ex_1:
create the following function
@fun_one

"fun_one" return "Welcome...!"

    call the fun_one.


Ex_2:
=> create the folowing function with 3 arguments
@fun_one

=> argumnets are string type.

=> call the fun_one.


Ex_3:
=> create the two functions
@fun_one
@fun_two

=> "fun_one" return "fun_two" definition.

=> "fun_two" retrurn "welcome" message.

=> call "fun_one"


Ex_4:
create the following functions.

@fun_one
@fun_two


pass "fun_two" definition to "fun_one" as argument.


"fun_one" displays the argument.

"fun_two" return "welcome...!".


Ex_5:
create the following function with two arguments.
@fun_one

@arg1 - string type.
@arg2 - Array of Hetrogeneous Elements.

pass "fun_two" & "fun_three" to fun_one as array


Assignment:
-----------

create the following functions.
@fun_one
@fun_two
@fun_three
@fun_four
@fun_five

"fun_two" return "fun_three" definition.

"fun_three" return "Hello...!" message.

"fun_four" return "fun_five" definition.

"fun_five" return "Hi....!" message.

pass "fun_two" & "fun_four" definitions to "fun_one" as arguments.

"fun_one" calling should display "Hello...!" & "Hi...!" message