expm1() in C++

The function expm1() is used to calculate the exponential raised to the power of any number minus one. It returns the value of (exponential raised to the power of a) - 1.

Here is the mathematical expression of expm1(),

expm1(a) = (e^a) - 1

Here is the syntax of expm1() in C++ language,

float expm1(variable_name);

Here,

• variable_name − Any name given to the variable whose value is calculated.

Here is an example of expm1() in C++ language,

Example

 Live Demo

#include <iostream>
#include <cmath>
using namespace std;

int main() {
   int x = 10;
   float y = 8.28;

   cout << "The value of x : " << expm1(x);
   cout << "\nThe value of y : " << expm1(y);

   return 0;
}

Output

Here is the output

The value of x : 22025.5
The value of y : 3943.19