how to assign value of light year in java datatype

Question

How can I assign value of light year in meters in java to datatype, it seems it is too long.

For example:- 9,460,730,777,119,564 is value in mtrs for 1 light year

Try [`BigInteger`](https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html) if even long is not enough — vahdet, Mar 13 '19 at 13:40
Do you need to account for relativity? Trick question: The speed of light is constant in all reference frames (just wanted to actually use my physics knowledge for something constructive). — Tim Biegeleisen, Mar 13 '19 at 13:42
Using `double` instead of `long` would be a better choice: `double lightYearInMeters = 9.460730777119564E+15;` — Thomas Fritsch, Mar 13 '19 at 13:48

score 2 · Answer 1 · answered Mar 13 '19 at 13:40

2

The Long datatype in standard java 2^63-1 digits, so the speed of light in meters should fit

answered Mar 13 '19 at 13:40

bWilliamson

score 1 · Answer 2 · answered Mar 13 '19 at 13:44

1

You can use Long for it.

Long lightYearsInMeters = new Long("9460730777119564");
System.out.println(lightYearsInMeters);

answered Mar 13 '19 at 13:44

Sujit kumar

2 Answers2