How to express the nth power of a number in C++

There are two ways to represent a number raised to the nth power in C: using the pow built-in operator or using the multiplication operator (for integer exponents).

Two main ways to represent a number raised to the nth power in C

In C, represents a There are two main ways to raise the nth power of a number:

1. Use the built-in operator

C provides the pow built-in operator, which Accepts two parameters: base and exponent, and returns the base raised to the power of the exponent.

<code class="cpp">#include <cmath>

int main() {
  double base = 2.5;
  int exponent = 3;
  double result = pow(base, exponent);
  std::cout << result << "\n";  // 输出：15.625
  return 0;
}</code>

2. Use multiplication operators

For integer exponents, you can use nested multiplication operators to calculate the nth power of a number. For example, to calculate 2 raised to the third power, you would do the following:

<code class="cpp">int base = 2;
int exponent = 3;
int result = 1;
for (int i = 0; i < exponent; i++) {
  result *= base;
}
std::cout << result << "\n";  // 输出：8</code>

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