Float Sum With Javascript Duplicate

JavaScript is a versatile programming language that allows developers to create dynamic and interactive websites. One common task that developers often encounter is the need to sum floating-point numbers using JavaScript. In this article, we will walk through how to calculate the sum of floating-point numbers, as well as how to handle duplicates efficiently.

When working with floating-point numbers in JavaScript, it's essential to understand how these numbers are represented in the language. Floating-point numbers are numbers that contain a decimal point or use exponential notation. In JavaScript, floating-point numbers are represented as 64-bit floating-point values using the IEEE 754 standard.

To sum floating-point numbers in JavaScript, you can use the `parseFloat()` function to convert strings to floating-point numbers. For example, if you have two variables `num1` and `num2` that contain floating-point numbers represented as strings, you can convert them to floating-point numbers and calculate the sum as follows:

let num1 = "3.14";
let num2 = "2.78";

let sum = parseFloat(num1) + parseFloat(num2);

console.log(sum); // Output: 5.92

In the above example, we use the `parseFloat()` function to convert the string representations of the numbers `num1` and `num2` to floating-point numbers and then add them together to calculate the sum.

However, what if you want to handle duplicates while summing floating-point numbers in JavaScript? One approach is to maintain a running total of unique numbers and check for duplicates before adding a number to the total. This can be achieved by using an object to keep track of the unique numbers encountered so far.

Here's an example implementation that demonstrates how to sum floating-point numbers in JavaScript while filtering out duplicates:

let numbers = [3.14, 2.78, 3.14, 1.23, 2.78];
let uniqueNumbers = {};
let total = 0;

numbers.forEach(number => {
    if (!uniqueNumbers[number]) {
        total += number;
        uniqueNumbers[number] = true;
    }
});

console.log(total); // Output: 7.15 (3.14 + 2.78 + 1.23)

In the example above, we use an object `uniqueNumbers` to keep track of unique numbers encountered in the `numbers` array. We iterate over each number in the array, check if it is already present in `uniqueNumbers`, and only add it to the `total` if it is unique.

By using this approach, you can efficiently sum floating-point numbers in JavaScript while ensuring that duplicates are handled appropriately.

In conclusion, summing floating-point numbers in JavaScript is a common task that can be easily accomplished using the `parseFloat()` function. By understanding how to convert strings to floating-point numbers and handle duplicates efficiently, you can write cleaner and more robust code for your JavaScript applications.