Computer scienceProgramming languagesJavaScriptBasicsIntroduction to JavaScript

Declaring variables

Decoding variable behavior

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Consider

/* sample variable declaration */
let a = 'hello';

and

/* sample const variable declaration */
const b = 'world';

As part of a multi-line program, how will the JavaScript runtime treat these statements? And if we try to reassign a value to b, what will happen?

Select one option from the list

The let statement will define 'a' with 'hello', the const will define 'b' with 'world', and 'b' can be reassigned with no issues.

Both the let and const statements will define 'a' and 'b' respectively, and reassigning 'b' will lead to a SyntaxError.

The let and const keywords are not recognized in JavaScript and will cause an error.

The let statement will define 'a' with 'hello', theconst will define 'b' with 'world', and a TypeError will be thrown if we try to reassign the value to 'b'.

Both the let and const statements will be ignored due to the presence of comments, and reassigning to 'b' will have no effect.

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