Perhaps you didn't catch that basically the difference between let and var is that let is block-scoped, while var is function-scoped? let result = 0; for (

Perhaps you didn't catch that basically the difference between let and var is that let is block-scoped, while var is function-scoped? let result = 0; for (let i = 0; i < arr.length; i++) { result += arr[i]; }