**Q:**
Why doesn't C have an
exponentiation operator?

**A:**
One reason is
probably
that
few processors have
a built-in
exponentiation instruction.
C has a
`pow` function
(declared in `<math.h>`)
for performing exponentiation,
although explicit multiplication is usually better
for small positive integral exponents.
[footnote]
In other words, `pow(x, 2.)`
is probably inferior
to
`x * x`.
(If you're tempted to make
a `Square()` macro,
though,
check question 10.1 first.)

References:
ISO Sec. 7.5.5.1

H&S Sec. 17.6 p. 393

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