What is block scope in JavaScript?

Can you explain what block scope is in JavaScript?

Sure! Block scope refers to the visibility of variables within a specific block of code, such as within curly braces {}.

How does block scope differ from function scope?

Great question! Function scope allows variables to be accessible within the entire function, while block scope restricts access to the block.

Can you give me an example of block scope?

Of course! For instance, if you declare a variable using 'let' inside an if statement, it won't be accessible outside that if block.

What happens if I use 'var' instead of 'let'?

Using 'var' declares a variable with function scope, meaning it will be accessible throughout the entire function, not just the block.