Natural Exponential Function

Natural exponential function.

The natural exponential function is defined as

where e is Euler's number.

Usage

var exp = require( '@stdlib/math/base/special/exp' );

exp( x )

Evaluates the natural exponential function.

var v = exp( 4.0 );
// returns ~54.5982

v = exp( -9.0 );
// returns ~1.234e-4

v = exp( 0.0 );
// returns 1.0

v = exp( NaN );
// returns NaN

Examples

var randu = require( '@stdlib/math/base/random/randu' );
var exp = require( '@stdlib/math/base/special/exp' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = (randu()*100.0) - 50.0;
    console.log( 'e^%d = %d', x, exp( x ) );
}