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C++ cmath exp() function

❮ Math Functions


Example

Return e raised to the power of different numbers:

cout << exp(0);
cout << exp(1);
cout << exp(10);
cout << exp(4.8);
cout << exp(2.718);
Try it Yourself »

Definition and Usage

The exp() function returns the result of e raised to the power of a number (ex).

The exp() function is defined in the <cmath> header file.

e is the base of the natural system of logarithms (approximately 2.718282). Some implementations of the <cmath> library include a constant M_E but it is not guaranteed to be available.


Syntax

One of the following:

exp(double number);
exp(float number);

Parameter Values

Parameter Description
number Required. Specifies the power to which e is raised.
If the number is an integer type then it will be treated as a double.

Technical Details

Returns: A float value (if the argument is float) or double value (in any other case) representing the result of e to the power of a number.

❮ Math Functions

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