Problems with adding double.

I got a really strange problem about adding 2 doubles.

double a = 2.3 + 3.4;
System.out.println(a);
the result will be 5.699999999999.
Can anybody explain it for me!!!!!

Quote:

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Originally Posted by ngoc09

I got a really strange problem about adding 2 doubles.

double a = 2.3 + 3.4;
System.out.println(a);
the result will be 5.699999999999.
Can anybody explain it for me!!!!!

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Read Goldberg's article and you know all.

kind regards,

Jos

U have to determine the number of digits after the decimal point, this problem is related to the binary representation of doubles and intgers, it usually happens that's why it is better to determine the number of digit after the decimal point u want to represent, this will force the rounding of the result and fix this calculation error

Quote:

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Originally Posted by baf06

U have to determine the number of digits after the decimal point, this problem is related to the binary representation of doubles and intgers, it usually happens that's why it is better to determine the number of digit after the decimal point u want to represent, this will force the rounding of the result and fix this calculation error

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Determining the representation of IEEE754 floaing point numbers doesn't fix any calculation errors. Read the link I supplied in my previous reply.

kind regards,

Jos