How to express exponentiation in C language

There are two ways to express power in C language: using the pow() function, which receives the base and exponent and returns the result; or using the power operator (**), which directly calculates the power of the base and exponent.

Representation of exponents in C language

In C language, exponents can be expressed in the following two ways :

1. Use the pow() function

pow() The function receives two real number parameters: base and Index and return the result.

<code class="c">#include <math.h>

double result = pow(2.0, 3.0); // 计算 2 的 3 次方</code>

2. Use Power operator (**)

Power operator* * Directly calculate the power of two numbers. The number on the left is the base and the number on the right is the exponent.

<code class="c">double result = 2.0 ** 3.0; // 计算 2 的 3 次方</code>

Example:

<code class="c">#include <stdio.h>
#include <math.h>

int main() {
  double x = 2.0;
  double y = 3.0;

  // 使用 pow() 函数计算 x 的 y 次方
  double result1 = pow(x, y);

  // 使用乘方运算符计算 x 的 y 次方
  double result2 = x ** y;

  printf("x 的 y 次方，使用 pow() 函数：%f\n", result1);
  printf("x 的 y 次方，使用乘方运算符：%f\n", result2);

  return 0;
}</code>

Output:

<code>x 的 y 次方，使用 pow() 函数：8.000000
x 的 y 次方，使用乘方运算符：8.000000</code>

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