// big numbers

// load math.js and create an instance

// the default type of numbers is configured as big numbers

var mathjs = require('../index'),

math = mathjs({

number: 'bignumber', // Default type of number: 'number' (default) or 'bignumber'

decimals: 20 // number decimal places behind the dot for big numbers

});

/**

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

* @param {*} value

*/

function print (value) {

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

}

console.log('round-off errors with numbers');

print(math.add(0.1, 0.2)); // Number, 0.30000000000000004

print(math.divide(0.3, 0.2)); // Number, 1.4999999999999998

console.log();

console.log('no round-off errors with big numbers');

print(math.add(math.bignumber(0.1), math.bignumber(0.2))); // BigNumber, 0.3

print(math.divide(math.bignumber(0.3), math.bignumber(0.2))); // BigNumber, 1.5

console.log();

console.log('create big numbers from strings when exceeding the range of a number');

print(math.bignumber(1.2e+500)); // BigNumber, Infinity WRONG

print(math.bignumber('1.2e+500')); // BigNumber, 1.2e+500

console.log();

// one can work conveniently with big numbers using the expression parser.

// note though that big numbers are only supported in arithmetic functions

console.log('use big numbers in the expression parser');

print(math.eval('0.1 + 0.2')); // BigNumber, 0.3

print(math.eval('0.3 / 0.2')); // BigNumber, 1.5

console.log();