Exponential Function

Exponential function.

The exponential function is defined as

where b is the base and x is the exponent.

Installation

$ npm install math-power

Usage

var pow = require( 'math-power' );

pow( base, exponent )

Evaluates the exponential function.

var val = pow( 2, 3 );
// returns 8

val = pow( 4, 0.5 );
// returns 2

val = pow( 100, 0 );
// returns 1

val = pow( Math.PI, 5 );
// returns ~306.0197

val = pow( Math.PI, -1/5 );
// returns ~0.7954

val = pow( NaN, 3 );
// returns NaN

val = pow( 5, NaN );
// returns NaN

Examples

var pow = require( 'math-power' );

var b;
var x;
var i;

for ( i = 0; i < 100; i++ ) {
	b = Math.round( Math.random()*10 );
	x = Math.round( Math.random()*10 ) - 5;
	console.log( '%d^%d = %d', b, x, pow( b, x ) );
}

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

This repository uses tape for unit tests. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

Browser Support

This repository uses Testling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:

$ make test-browsers

To view the tests in a local web browser,

$ make view-browser-tests

License

MIT license.

Copyright

Copyright © 2016. The Compute.io Authors.