0.1+0.2 === 0.3 // output: false

Question

Very interesting. I tried on JavaScript but something went wrong.

0.1+0.2=0.30000000004 what? really? I so confused. Why result show me wrong answer?

Answer 1

This is an action of the accuracy of the calculations. When JavaScript performs calculations, it converts the values to binary equivalents. And here there is a problem, since 0.1 can not be exactly represented in the binary equivalent, which is used for binary floating-point operations.
In order to overcome this incident, there are two methods (the choice is yours):
1. Convert values to integers, calculate, and then reverse convert to decimals.
2. building the logic so that it works with a range of numbers, not an exact value.

Answer 2

other oddities:
null is an object,
NaN is a number,
array without keys == false //Answer: true

Answer 3

floating point arithmetic is not always 100% accurate.
To solve this type of problem you can use (0.1*10 + 0.2*10) / 10

Answer 4

Vansh Kaushik please can you create different threads to ask your question
So no one would get confused

Answer 5

The accuracy of calculating is so bad for decimal number, I also have the same problem when working on my python calculator

Answer 6

How i make program if i write hello he say hello vansh

Answer 7

Vansh Kaushik 🤔🤔🤔🤔🤔

Answer 8

When i am running my calculator on JS, I have the same problem.

Answer 9

Buena