rishu-node-app/calculator.js

Sample node js application

exports.add=function(a,b)
{
    return a+b;
}
exports.sub=function(a,b)
{
    return a-b;
}
exports.mul=function(a,b)
{
    return a*b;
}
exports.div=function(a,b)//this type of exports in done only for function and object.. not for class....remember this things...
{
    if(b===0)
    throw new Error("can not be divide by 0");
    return a/b;
}
module.exports={

}