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The absolute value of a number is defined conceptually as its distance from 0. The absolute value of a complex number is therefore defined by the distance formula:

|z| = sqrt(re(z)2 - im(z)2)

0 is a complex number, as is proven as follows:

A complex number is a number of the form x + yi, where x and y are numbers.

0i = 0.

0 = 0 + 0.

0 = 0 + 0i.

0 = x + yi where x and y are 0.

0 is a number.

Therefore, 0 is a complex number.

As such, the distance formula can be used to calculate |0|:

|0| = sqrt(re(0)2 - im(0)2)

= sqrt(02 - 02)

= sqrt(0 - 0)

= sqrt(0)

= 0

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Q: What is absolute value of 0?
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