expm1
Compute
exp(x) - 1
.
Usage
var expm1 = require( '@stdlib/math/base/special/expm1' );
expm1( x )
Computes exp(x) - 1
, where exp(x)
is the natural exponential function.
var v = expm1( 0.2 );
// returns ~0.221
v = expm1( -9.0 );
// returns ~-1.0
v = expm1( 0.0 );
// returns 0.0
v = expm1( NaN );
// returns NaN
Examples
var randu = require( '@stdlib/random/base/randu' );
var expm1 = require( '@stdlib/math/base/special/expm1' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*10.0) - 5.0;
console.log( 'e^%d - 1 = %d', x, expm1( x ) );
}