node.js has the same V8 engine as chrome thus they are very fast
Variables have single primitives or compound data.
Primitives are basically collection or number, string or text, or booleans, compound data is held by arrays and objects.
Arrays are called lists in other languages as the clusters of the orders structured data.
Objects know as dictionaries in other languages are they are just used with the key and then the definition is obtained in the result.
Speaking of loos we use a "for in loop" to iterate over an object and a "for of loop" to iterate over an array.
functions are any code that we want to use more than once which countries function names and the parameters as an input to the function.
Methods as used in calling some inbuilt or written function(functions written from the programmer)
functions can also be written as an arrow function