Integer Power of a Number

1. Problem Description

Given a floating-point number base of type double and an integer exponent of type int, calculate base raised to the power of exponent.

It is guaranteed that base and exponent are not both 0.

2. Approach

3. Implementation

func Power(base float64, exponent int) float64 {
	if base == 0 {
		return 0
	}
	if exponent == 0 {
		return 1
	}

	opt := 1
	if exponent < 0 {
		opt = -1
		exponent = - exponent
	}

	data := 1.0
	for i := 0; i < exponent; i++ {
		data = data * base
	}

	if opt == -1 {
		return 1 / data
	}

	return data

}

4. References

• Integer Power of a Number - NowCoder