CPP Create Lambda with Recursion - C++

Lambda functions in C++ are a powerful feature that allows programmers to write inline functions with concise syntax. Recursion, on the other hand, is a technique where a function calls itself to solve a problem. In this article, we will discuss how to create a lambda with recursion in C++.

To create a lambda with recursion, we need to define a variable that holds the lambda function. Here's an example:

auto factorial = [](int n) -> int {
  if (n == 0) {
    return 1;
  } else {
    return n * factorial(n - 1);
  }
};

In the example above, we define a lambda function called factorial. The function takes an integer parameter n and returns an integer value. Inside the lambda, we use recursion to calculate the factorial of n. If n is 0, we return 1. Otherwise, we return n multiplied by the factorial of n-1.

To use the lambda function, we can simply call it like any other function:

int result = factorial(5); // Returns 120

This will calculate the factorial of 5 using the lambda function we defined earlier.

Conclusion

Creating a lambda function with recursion in C++ is a powerful technique that can simplify code and make it easier to read and understand. By using lambdas, we can create inline functions with concise syntax that are easy to use. Recursion allows us to solve complex problems by breaking them down into simpler sub-problems. By combining these two techniques, we can create efficient and elegant code that is easy to maintain and debug.