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This approach uses the concept of closures to return a function that ignores its arguments and always returns the string 'Hello World'. In this method, createHelloWorld returns a new function that consistently returns the string when invoked.
Time Complexity: O(1) as the function performs a constant-time operation.
Space Complexity: O(1) since it doesn't use any extra space dependent on input size.
1
public class HelloWorld {
public Func<string> CreateHelloWorld() {
return () => "Hello World";
}
}In C#, a Func<string> delegate is returned which points to a lambda expression returning "Hello World". This allows easy assignment and invocation of the lambda expression.
This approach directly returns a function without using intermediate variables like closures. The returned function will always output 'Hello World', ignoring any provided arguments.
Time Complexity: O(1). The function executes a single return instruction.
Space Complexity: O(1) as there are no dynamic allocations.
1def hello_world_function():
2 return "Hello World"
3
4def create_hello_world():
5 return hello_world_functionIn Python, we define hello_world_function that returns "Hello World". This function is returned directly by create_hello_world, thereby leveraging Python's first-class functions.