how to compute power of negative number like 10^-1 or 10^-3

Negative powers pretty much always give fractional results, which means you must use floats. For floats, there is `powf`

and `powi`

. Note that `a^(-b) = 1 / a^b`

.

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Just a side note on terminology:

Doesn't the title suggest that `a < 0`

in `a ^ b`

?

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