+ 1

why output of this code is 0.30000000000000004 instead of 0.3

https://code.sololearn.com/c79jOIvcseLP

20th Jun 2022, 11:55 AM
shokin touch
3 Respuestas
+ 3
This is a good question indeed. The reason of the error is that computers store decimals in binary. For example, 0.5 is 0.1(binary), just like 4 is 100(binary). For 0.75, 0.25, 0.125, they can be saved as exact value. For 0.3, it is saved as an approximation. For more explicit explanation, I would recommend Anna's explanation to Kenny Wong. https://www.sololearn.com/Discuss/1477626/?ref=app Good job in thinking deep about these findings. You are on the right track. Keep up 💪
20th Jun 2022, 4:04 PM
Gordon
Gordon - avatar
0
js is not precise whan working with decimals and long numbers, you can use toFixed(1) to fix it to one decimal console.log((0.1+0.2).toFixed(1)) for 2 decimal like 0.30 use toFixed(2) and so on.. I wraped it in () to group them and apply toFixed to sum of two decimal numbers.
20th Jun 2022, 12:14 PM
PanicS
PanicS - avatar
0
I want to know how it calculate that answer will be equal to 0.30000000000000004 not for example 0.30000000000000013. it's not just for JS. in Python this problem also exists: https://code.sololearn.com/cH3DIz79mKe7
20th Jun 2022, 12:28 PM
shokin touch