A simple module for operations on arbitrarily large integers, because sometimes 64-bit floats don't quite cut it. In future versions, I plan to add support for operations on Z_n (i.e. modular arithmetic and multiplication), as well as some common number theory algorithms such as calculating gcd, lcm, etc.
To download the package simply run npm install --save z-math. Then just require it into your app like follows, and you are good to go: var integer = require('z-math')
Once you have the package imported you can create new integers with the integer(n) command where n is a regular integer in Javascript (technically a floating point number).
To convert an integer, say a, back to a JavaScript float use a.toFloat() or use it in the context of a mathematical operation, e.g. a + 5.
To convert an integer, say b, to a string, use b.toString(), or use it in the context of a string e.g. console.log('The integer is: ' + b)
Then the remaining operations are defined as follows:
Add 2 integers: integer.add(a, b)
Subtract 2 integers: integer.subtract(a, b)
Multiply 2 integers: integer.multiply(a, b)
Get the quotient when dividing 2 integers: integer.quotient(a, b)
Get the modulus when dividing 2 integers: integer.mod(a, b)
Find a to the power of b: integer.pow(a, b)
To test equality/inequality there are a number of functions: integer.greaterThan, integer.lessThan, integer.equal, integer.notEqual, integer.greaterThanEqual, integer.lessThanEqual
Note that you can use integer.lte and integer.gte as shortcuts for integer.lessThanEqual and integer.greaterThanEqual respectively.
All of these operations return new integers and leave the original ones untouched.