Calculate Power Without Built-In Functions
Given a number and an integer exponent, calculate the number raised to that exponent without using a built-in power function.
Calculate Number Power
Implement the following method:
double calculatePower(double base, int exponent)
base is the number to be raised.exponent is the power applied to the number.- The method returns
base raised to exponent.
Rules
- A positive exponent multiplies the base repeatedly.
- A negative exponent returns the reciprocal of the corresponding positive power.
- An exponent of
0 returns 1.0.
- Built-in power functions must not be used.
Constraints
-100.0 < base < 100.0 -2,147,483,648 ≤ exponent ≤ 2,147,483,647 - If
exponent < 0, then base ≠ 0.
- The result fits in a
double.
Examples
Example 1
calculatePower(base = 2.5, exponent = 3)
Output: 15.625
Example 2
calculatePower(base = -2.0, exponent = 4)
Output: 16.0
Example 3
calculatePower(base = 4.0, exponent = -2)
Output: 0.0625
Example 4
calculatePower(base = 8.3, exponent = 0)
Output: 1.0