How should I practice Power with Integer Exponents?

Start by reading the full statement, solve the visible examples, then compare the pattern against related NVIDIA phone screen problems in FastPrep.

Is Power with Integer Exponents associated with NVIDIA?

FastPrep tags this as a NVIDIA phone screen coding practice problem when the problem catalog has that company and stage context.

NVIDIA● MediumFULLTIMEPHONE SCREEN

Given a real number x and integer n, implement myPow(x, n) to return x^n without a built-in power function.

For this exercise, a zero exponent returns 1 and a negative exponent returns the reciprocal of the positive power. When x = 0, n is positive.

myPow(x: double, n: int) → double

x = 3.0n = 4return = 81.0

Four factors of three give 81.

x = 4.0n = -2return = 0.0625

The reciprocal of sixteen is 0.0625.

x = 2.5n = 0return = 1.0

Any nonzero base to exponent zero is one.

-100 < x < 100; x is finite.
-2^31 <= n <= 2^31 - 1.
The mathematical result is between -10^4 and 10^4 and representable as a finite double; very small magnitudes may underflow to zero.
Outputs are compared using absolute or relative tolerance 10^-9.