how to loop through files in a list code example

Example 1: python loop through list

list = [1, 3, 6, 9, 12] 
   
for i in list: 
    print(i)

Example 2: loop through arrays in es6

var sandwiches = [
	'tuna',
	'ham',
	'turkey',
	'pb&j'
];

sandwiches.forEach(function (sandwich, index) {
	console.log(index);
	console.log(sandwich);
});

// returns 0, "tuna", 1, "ham", 2, "turkey", 3, "pb&j"