How can you use a single parameter in a JavaScript function to swap the values of two numbers

Question

How can you use a single parameter in a JavaScript function to swap the values of two numbers

Here's the challenge I'm facing: I need to create a function that will output 5 when given a(0), and 0 when given a(5).

 a(0) = 5  
 a(5) = 0

It should look like this:
Hint: Use the following function structure
function A(num){} something along those lines

I'm new to JavaScript so any help would be greatly appreciated.

I would love to hear various solutions as it would benefit my career development greatly.

javascript

Answer 1

Answer №1

function exchange (value) {
  if( value == 0)
    return 5;
  return 0;
}

This function swaps values in JavaScript without any need for further explanation.

Answer 2

function exchange (value) {
  if( value == 0)
    return 5;
  return 0;
}

This function swaps values in JavaScript without any need for further explanation.

Answer 3

Answer №2

It appears that your intention is to input one variable into a function and return another variable that has not been defined yet. Then, by inputting this undefined variable back into the function, you want to define it and have the first input as the output, resulting in two outputs.

In theory, achieving this is impossible due to the presence of undefined variables. However, with a touch of creativity, I believe I have come up with a solution (a bit of a hack, but it should get the job done):

var i = 1;
var output1;
var output2;
function swap(input) {
    function func1(input) {
        output2 = input;
        i++;
    }
    function func2(input) {
        output1 = input;
        i = 1;
        alert(String(output1) + "\n" + String(output2));
    }
    if (i === 1) {
        func1(input);
    }
    else if (i === 2) {
        func2(input);
    }
}
while(true) {
    swap(prompt("Enter your first input (this will be your second output):"));
    swap(prompt("Enter your second input (this will be your first output):"));
}

The swap function alternates between the values 1 and 2 in the variable i, allowing it to keep track of first or second inputs and their respective outputs. The user's input for the prompt boxes serves as the parameter for the swap function. While the code may seem rudimentary, there is more complexity at play under the hood. By collecting all input data and reversing the order upon output, my program manages to provide the desired functionality. To an end-user unfamiliar with JavaScript intricacies, this approach would appear seamless.

This method should accommodate various data types, including objects, strings, numbers, and arrays. Give it a try; I hope it proves helpful!

Answer 4

It appears that your intention is to input one variable into a function and return another variable that has not been defined yet. Then, by inputting this undefined variable back into the function, you want to define it and have the first input as the output, resulting in two outputs.

In theory, achieving this is impossible due to the presence of undefined variables. However, with a touch of creativity, I believe I have come up with a solution (a bit of a hack, but it should get the job done):

var i = 1;
var output1;
var output2;
function swap(input) {
    function func1(input) {
        output2 = input;
        i++;
    }
    function func2(input) {
        output1 = input;
        i = 1;
        alert(String(output1) + "\n" + String(output2));
    }
    if (i === 1) {
        func1(input);
    }
    else if (i === 2) {
        func2(input);
    }
}
while(true) {
    swap(prompt("Enter your first input (this will be your second output):"));
    swap(prompt("Enter your second input (this will be your first output):"));
}

The swap function alternates between the values 1 and 2 in the variable i, allowing it to keep track of first or second inputs and their respective outputs. The user's input for the prompt boxes serves as the parameter for the swap function. While the code may seem rudimentary, there is more complexity at play under the hood. By collecting all input data and reversing the order upon output, my program manages to provide the desired functionality. To an end-user unfamiliar with JavaScript intricacies, this approach would appear seamless.

This method should accommodate various data types, including objects, strings, numbers, and arrays. Give it a try; I hope it proves helpful!

Answer 5

Answer №3

Here is a brief alternative to @mtizziani's solution:

let swap = input => !input * 5 // simple as that

console.log(swap(0));
console.log(swap(5));

We toggle the given value, so input becomes either 1 or 0
Then we multiply it by 5.

Task completed successfully.

Answer 6

Here is a brief alternative to @mtizziani's solution:

let swap = input => !input * 5 // simple as that

console.log(swap(0));
console.log(swap(5));

We toggle the given value, so input becomes either 1 or 0
Then we multiply it by 5.

Task completed successfully.

How can you use a single parameter in a JavaScript function to swap the values of two numbers

Answer №1

Answer №2

Answer №3

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