why '==' is not working properly, or what do I do wrong?
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I just want to know why this happens...

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Bob Thompson
el 21 de Nov. de 2018
More than likely this is a limitation of the binary. If you expand the number of sigfigs on a(5) and b(100) you will likely find that some small decimal place is slightly different.
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Jos (10584)
el 21 de Nov. de 2018
There is a small difference, as shown by subtraction:
b(100)-a(5)
To tolerate such a small difference between x and y, try this
abs(x-y) < .0001
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