Accuracy of the double type [Errors During calculation ]. (0.1*0.1, 1.0-0.9)

If you think the result of IF (0.1*0.1 = 0.01) is true

Then you are wrong !!

The calculation result is as follows:

System. Out. println (0.1*0.1); system. Out. println (1.0-0.9 );

0.010000000000000002

0.09999999999999998

Cause:

A floating point value is represented in binary format. In binary systems, the value cannot be exactly 1/10, just as in decimal format,

This produces an error. If you want to avoid the error as much as possible, use the bigdecimal class for calculation, especially in the financial field.