// units

// load math.js

var math = require('../index');

/**

* Helper function to output a value in the console. Value will be formatted.

* @param {*} value

*/

function print (value) {

var precision = 14;

console.log(math.format(value, precision));

}

// units can be created by providing a value and unit name, or by providing

// a string with a valued unit.

console.log('create units');

var a = math.unit(45, 'cm');

var b = math.unit('0.1m');

print(a); // 450 mm

print(b); // 100 mm

console.log();

// units can be added, subtracted, and multiplied or divided by numbers

console.log('perform operations');

print(math.add(a, b)); // 0.55 m

print(math.multiply(b, 2)); // 200 mm

console.log();

// units can be converted to a specific type, or to a number

console.log('convert to another type or to a number');

print(b.to('cm')); // 10 cm Alternatively: math.to(b, 'cm')

print(math.to(b, 'inch')); // 3.937 inch

print(b.toNumber('cm')); // 10

console.log();

// the expression parser supports units too

console.log('parse expressions');

print(math.eval('2 inch to cm')); // 5.08 cm

print(math.eval('cos(45 deg)')); // 0.70711

console.log();

// convert a unit to a number

// A second parameter with the unit for the exported number must be provided

print(math.eval('number(5 cm, mm)')); // number, 50