TypeScript for Beginners - let Prefix

What is the primary purpose of using 'let' in JavaScript?

• To declare a global variable

• To create a block-scoped variable

• To define a constant value

• To declare a variable without initialization

Which JavaScript version introduced the 'let' keyword?

• ES5

• ES6

• ES7

• ES8

How does 'var' differ from 'let' in terms of scope?

• 'var' is block-scoped, 'let' is function-scoped

• 'var' is function-scoped, 'let' is block-scoped

• Both 'var' and 'let' are function-scoped

• Both 'var' and 'let' are block-scoped

What happens if you try to access a 'let' variable outside its block?

• It behaves like a global variable

• It returns null

• It returns undefined

• It throws a reference error

In the provided example, what will happen if you use 'var' instead of 'let' in the for loop?

• The variable will be accessible outside the loop

• The variable will be accessible only within the loop

• The variable will not be initialized

• The variable will cause a syntax error