Implementing closure within a recursive function allows for better control

Question

Implementing closure within a recursive function allows for better control

One of my functions is designed to take a parameter and print the last number in the Fibonacci Series. For example, if the parameter is 3, it would return 2 as the series progresses like 1, 1, 2.

function recursionFib(num){
            if(num==0) return 0;
            if(num==1) return 1;
            return recursionFib(num-1)+recursionFib(num-2);
        }

Now, I am interested in implementing closure within this function so that I can display the entire Fibonacci series instead of just the last number.

javascript

Answer 1

Answer №1

If you are implementing recursion, it is important to have a print function that maintains the pattern.

function displayAndContinue(value) {
    console.log(value);
    return value;
}

You can incorporate this function in your return statements to both print and return the value. For example:

function fibonacciRecursion(num){
    if(num==0) return displayAndContinue(0);
    if(num==1) return displayAndContinue(1);
    return displayAndContinue(fibonacciRecursion(num-1)+fibonacciRecursion(num-2));
}

This approach will showcase the computation tree. If you only want to display the series, print the result of fibonacciRecursion(num-1) and then the total sum.

Answer 2

If you are implementing recursion, it is important to have a print function that maintains the pattern.

function displayAndContinue(value) {
    console.log(value);
    return value;
}

You can incorporate this function in your return statements to both print and return the value. For example:

function fibonacciRecursion(num){
    if(num==0) return displayAndContinue(0);
    if(num==1) return displayAndContinue(1);
    return displayAndContinue(fibonacciRecursion(num-1)+fibonacciRecursion(num-2));
}

This approach will showcase the computation tree. If you only want to display the series, print the result of fibonacciRecursion(num-1) and then the total sum.

Implementing closure within a recursive function allows for better control

Answer №1

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