What are anonymous functions?

An anonymous function (or lambda expression) in Dart/Flutter is a function without a name. It can accept arguments and return a value, similar to regular functions, but is defined directly where it is used.

Main characteristics:

• Nameless: They do not have an identifier for calling by name.
• Inline definition: They are created and used immediately where needed.
• Closures: They can capture variables from the scope where they were defined.

Examples of usage:

• As parameters to other functions (e.g., callbacks).
• For short, one-time operations.

// Example of using an anonymous function as a callback for the forEach method
List<int> numbers = [1, 2, 3];
numbers.forEach((number) {
  print(number * 2);
});

// Anonymous function assigned to a variable
var multiply = (int a, int b) {
  return a * b;
};
print(multiply(5, 3));

Advantages:

• More concise code for simple operations.
• Allows passing behavior as an argument.
• Frequently used in functional programming.