How to express the power function in c++

In C, the pow() function is used to calculate the power value. It accepts two parameters: base and exponent, and returns the base raised to the power of the exponent. The pow() function can only exponentiate double-precision floating-point numbers and will produce specific results when the base or power is a negative number.

Power functions in C

In C you can use pow() Function exponentiates two numbers. This function accepts two parameters:

• #base: The base to be exponentiated.
• exponent: The exponent to be raised to the power of the base.

pow() The function will return base raised to the exponent power.

Grammar:

double pow(double base, double exponent);

Example:

#include <iostream>
#include <cmath>

using namespace std;

int main() {
  // 计算 2 的 5 次幂
  double result = pow(2, 5);

  // 打印结果
  cout << result << endl;  // 输出：32

  return 0;
}

Note:

• pow() The function can only exponentiate double-precision floating-point numbers. If you need to exponentiate an integer, you can use the powl() function, which accepts an argument of type long double.
• pow() The function returns NaN (not a number) when the base is negative.
• When the power is a negative number, the pow() function will return the reciprocal power of the base. For example, pow(2, -2) returns 1/4.

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