exp()

The exp() function returns the base-e exponential value of the argument (i.e., e raised to the power of the argument). This is the inverse of the log() function.

Syntax

exp(x)

The x parameter is a double value that can be positive, negative, or zero.

Example

The following example uses the exp() function to find the value of e³:

#include <iostream>
#include <cmath>

int main() {
  double x = 3;
  double result;

  result = exp(x);

  std::cout << "The exp of " << x << " is " << result << "\n";
}

This produces the following output:

The exp of 3 is 20.0855

Codebyte Example

The following example is runnable and returns the value of e¹:

Code
Output
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