Script to create 100 folders with files inside them

index.js

var fs = require('fs')

var create = function(i) {
  fs.mkdir('folder'+i, 0700, function(err) {
    if(err) 
      console.log(err)
    fs.open('folder'+i+'/file'+i, 'w', 0700, function(err, fd) {
      fs.close(fd);
    })
  })
};

for(var i = 1; i <= 100; i++) {
  create(i);
}