C++ pow()

The pow() function returns the result of a base value raised to the power of an exponent.

Syntax

pow(base, exponent)

The base and exponent parameters are integers or of type float. If base is zero, the function returns 0.0. If exponent is zero, the function returns 1.0.

• A domain error may occur if the base is a float and exponent is not an integer value.
• A pole or range error may occur due to overflow.
• A range error may occur due to underflow.

Example

The following example uses the pow() function to raise 2 to the power of 2:

#include <iostream>
#include <cmath>

int main() {
  double base = 2;
  double exponent = 2;

  double result = pow(base, exponent);
  std::cout << base << " raised to the power of " << exponent << " equals " << result << ".\n";
  // Output: 2 raised to the power of 2 equals 4
}

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Codebyte Example

The following example is runnable and uses the pow() function to find the nth-root of 16 by raising the base to the reciprocal of the desired root:

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