CallBack Function

 let fs=require("fs");


// let data=fs.readFileSync('covid.csv');
// console.log('=========Data========');
// console.log(data.toString());
// console.log('=========Data========');
// console.log('=========Program End========');

fs.readFile('covid.csv',function (error,data) {
console.log('=========Data========');
console.log(data.toString());
console.log('=========Data========');
});
console.log('=========Program End========');

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