An anonymous function in Dart is like named function but they do noy have names associated with it.

An anonymous function can have zero or more parameters with optional type annotations.

• In dart most of the functions are named functions we can also create nameless function knows as an anonymous function, lambda, or closure.

• In dart we can assign any anonymous function to constants or variables, later we can access or retrieve the value of closure based on our requirements.

High Order Function:

When a function returns another function ,it is referred to as a High Order Function, or When a function takes parameter as a function, it is called a higher-order function.

In this example, we are using a lambda function to demonstrate how a higher-order function works.

• In main(), we define a lambda function addTwoNumbers using the syntax (int a, int b) => a + b. This function takes two integers as input parameters a and b, and it returns their sum.

• addTwoNumbers is then passed as an argument to the higher-order function myNewFunction.

• The myNewFunction function takes a string msg and a function summation as parameters. It prints the message msg and then calls the summation function with 6 and 7 as arguments, printing the result.

• This demonstrates the use of lambda functions (anonymous functions) and higher-order functions in Dart. Lambda functions are convenient for short, simple functions, and higher-order functions allow for functions to be passed around as arguments or returned from other functions.