Detailed explanation of file system analysis example

File system

var fs = require("fs")

2. Asynchronous and Synchronous

Functions that read file contents include asynchronous () and synchronous ().

var fs = require('fs')
( '','utf-8', function (err,data) {
  if( err )
  {
    (err)
  }else{
    ( "not aynsc===>" + data )
  }
})
('app started')
 
var rlt = ('')
('rlt====>'+ rlt )

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