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ted Gadie
Full Stack JavaScript Techdegree Student 5,699 Pointswhy use `let` when `var` is working pretty well ?
var book = {
title : 'Black hat python',
author: 'Justin Seitz',
publish_year: 2015,
};
for (var key in book){
console.log(key, ': ',book[key]);
}
2 Answers
Steven Parker
231,172 PointsIt wouldn't make much difference for the definition of "book", but an advantage of "let" for the loop variable is that the scope is limited to within the loop. So if there happens to be another variable with the same name in the wider scope, this prevents a conflict.
ted Gadie
Full Stack JavaScript Techdegree Student 5,699 PointsThx