Why should I use let instead of var?

Why should I use let instead of var in my JavaScript code?

Using 'let' instead of 'var' is recommended because 'let' has block scope, which helps prevent variable hoisting issues.

What do you mean by block scope?

Block scope means that a variable declared with 'let' is only accessible within the block it is defined, unlike 'var'.

Can you give me an example of block scope?

Sure! If you declare a variable with 'let' inside a loop, it won't be accessible outside that loop.

Are there any downsides to using let?

One downside is that 'let' can lead to confusion if you're not familiar with its scope rules, especially for beginners.