Why 0.1 + 0.2 == 0.3 is false ??

Question

Why 0.1 + 0.2 == 0.3 is false ??

https://code.sololearn.com/cn9WNbcA788W/?ref=app

Answer 1

Because double has 15 decimal digits of precision means:
a=0.1;//0.100000000000001
b=0.2;//0.200000000000003
c=0.3;//0.300000000000004

But in float data type floating point is not change.
change data type double to float

Answer 2

https://www.sololearn.com/discuss/1392436/?ref=app
https://www.sololearn.com/discuss/1344720/?ref=app
https://www.sololearn.com/discuss/1288636/?ref=app

if you want a great explanation for this then view the video in following link:
https://javascriptweekly.com/link/77414/83ac73f344

Answer 3

Hello World and burey thanks
i got the answer

Answer 4

Because floating point arithmetic is not exact due to the representation of floats in computers not being exact.