In this, we define module is created in file_1.js and use in file_2.js

for use the one file into another then i use the REQUIRE.

 

file_1.js

==============================

var sum = function(a,b){

        return a+b;

}

module.exports = sum;

 

file_2.js

==============================

var result = require('./file_1');

console.log(result(1,2));

"Programming isn't about what you know,
it's about what you can figure out.”