How should I practice Pow(x, n)?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Bloomberg LP phone screen and onsite interview problems in FastPrep.

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Pow(x, n)

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Problem statement

Return x raised to the integer power n.

For a negative exponent, return the reciprocal of the corresponding positive power.

Function

myPow(x: double, n: int) → double

Examples

Example 1

x = 2.0n = 10return = 1024.0

Two multiplied ten times is 1024.

Example 2

x = 2.0n = -2return = 0.25

A negative exponent takes the reciprocal.

Constraints

-100.0 < x < 100.0.
n is a 32-bit signed integer.
Inputs avoid undefined division by zero.