Floating-Point Conversion Precision Issues

gostov2

gos

Posts: 13

Threads: 8

Joined: Mar, 2023

Reputation: 0

Posted

Greetings,

I'm working on a JavaScript project in which I need to transform texts supplied by the user to floating-point values. However, throughout the conversion, I noticed an accuracy issue that generated unexpected results.

function convertToFloat(input) {
    return parseFloat(input);
}

let userInput = "0.1";
let result = convertToFloat(userInput);

console.log("User input:", userInput);
console.log("Converted result:", result);

Here's an example of my code:

User input: 0.1
Converted result: 0.1

In principle, the result should be 0.1, but I'm receiving the following:

The conversion does not appear to preserve the correct floating-point representation, thus I went on the internet and read scaler article. I've heard about floating-point accuracy problems with JavaScript, but I'm not sure how to deal with them in this situation.

Could you share some best practices for dealing with accuracy issues during string-to-floating-point conversions? Your cooperation would be much appreciated.

Thank you for your time and knowledge.

0

Thank you

DracoFAAD

Posts: 70

Threads: 6

Joined: Aug, 2022

Reputation: 4

Replied

Wth

Why create a function that just calls another function??!?!??!

0

Whoman

0981

Posts: 1391

Threads: 71

Joined: May, 2022

Reputation: 17

Replied

i didnt really understand the issue but it seems pretty accurate to me:

User input: 0.0543953

Converted result: 0.0543953

Comments

SeizureSalad 36 Reputation

Commented

do 0.1 + 0.2 and then come back lmfao

0

Whoman 17 Reputation

Commented

@SeizureSalad that happens with every language, and i didnt see that in this post

0

SeizureSalad 36 Reputation

Commented

@Whoman nuh uh doens't hpapen in c#

0

0

Did I mention I use arch btw?

Floating-Point Conversion Precision Issues

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