Answer & Solution
Answer: Option B
Solution:
A const variable must be initialized at the time of declaration, otherwise it will cause a syntax error.
Q
Can a const variable be declared without an initial value?
Related Questions on Average
What is the output of the following code: let z = 3; z = 5; console.log(z);?
A). 3
B). 5
C). undefined
D). ReferenceError
What will the following code output: { const a = 10; a = 20; }?
A). 10
B). 20
C). undefined
D). TypeError
Can a variable declared with let be hoisted?
A). Yes, partially
B). No
C). Yes, fully
D). Only in strict mode
Which keyword should be used for a variable that might be reassigned?
A). const
B). let
C). var
D). function
Can const variables be reassigned in nested scopes?
A). Yes
B). No
C). Only if they are strings
D). Only in strict mode
Which keyword allows block-level scope in ES6?
A). var
B). let
C). function
D). var and function
What will the following code output: { let y = 5; { let y = 10; console.log(y); } }?
A). 5
B). 10
C). undefined
D). ReferenceError
What is the primary difference between var and let?
A). Scope
B). Initialization
C). Data type
D). Assignment
What will be the output of the following code: let x = 10; { let x = 20; } console.log(x);?
A). 10
B). 20
C). undefined
D). ReferenceError
What is the scope of a variable declared with let?
A). Global
B). Function
C). Block
D). Object