Nowadays JavaScript has three different keywords to declare a variable — var ... that live within the block scope. Next, we’ll build very similar examples by using different keywords ...

Here’s an example: let myVar = true; JavaScript “coerces” variables ... so keeping a variable in the smallest scope is always good practice. Although variables are a fairly simple aspect ...

in javascript's case ... Pre-standard C++ had quirky scope behavior similar to your first example - variables declared specifically in a for loop's initializer statement remained in scope through ...