Can you explain the purpose of the 'let' and 'const' keywords introduced in ES6?

Certainly. 'let' and 'const' are block-scoped variables introduced in ES6. 'let' allows reassignment of variables, providing flexibility when you need to change the variable value. 'const', on the other hand, creates variables that cannot be reassigned, ensuring the variable's immutability, which can enhance code predictability and maintainability.