js writing to json file

1var fs = require('fs');
2
3var data = {}
4data.table = []
5for (i=0; i <26 ; i++){
6   var obj = {
7       id: i,
8       square: i * i
9   }
10   data.table.push(obj)
11}
12fs.writeFile ("input.json", JSON.stringify(data), function(err) {
13    if (err) throw err;
14    console.log('complete');
15    }
16);