When I divide 317 by 219 in Java using doubles I get 1.
For example:
double b = 317/219;
System.out.println(b);
Output is: 1.
Is this because it is a recurring decimal? Have had to use BigDecimal instead which is annoying.
When I divide 317 by 219 in Java using doubles I get 1.
For example:
double b = 317/219;
System.out.println(b);
Output is: 1.
Is this because it is a recurring decimal? Have had to use BigDecimal instead which is annoying.
Try this
double b = 317/219D;
The default type of coded numbers in java is int
, so with the code as you have it java is working with two int
numbers and the result of the division would then be int
too, which will truncate the decimal part to give a final result of 1
. This int
result is then cast from int 1
to a double 1
without a compiler warning because it's a widening cast (one where the source type is guaranteed to "fit" into the target type).
By coding either of the numbers as double
with the trailing D
(you may also use d
, but I always use upper case letters because L
as lowercase l
looks like a 1
), the result of the division will be double
too.
Another alternative...
double b = (double)317/219;
This is because you have used integer literals, so you're doing an integer division.
Try writing double b = 317.0/219.0;
instead.
It is worth mentioning that there is no division in your example at runtime. 317/219 is calculated at compile-time (integer division, fraction is discarded) and replaced with a constant. If you decompile .class (I used Jad http://www.kpdus.com/jad.html) you will see
double b = 1.0D;
This is int
dividing. Write:
double b = 317.0/219;
System.out.println(b);
since numbers you put are inetgers so is the answer.
to get double you need either to use a number with floating point or to cast one of the integers you use:
double b = 317.0/219;
System.out.println(b);
or:
double b = ((double)317)/219;
System.out.println(b);
You could try
double b = 0.0;
b = 317/219;
so that i can return the decimal point