var Calculator=require('./calc');
var x=50,y=10;
console.log("Addition of 50&10 is"+Calculator.add(x,y));
console.log("Subtraction of 50&10 is"+Calculator.sub(x,y));
console.log("Addition of 50&10 is"+Calculator.mul(x,y));
console.log("Addition of 50&10 is"+Calculator.div(x,y));