Answer & Solution
Answer: Option C
Solution:
The output will be an error because 'b' is block-scoped and not accessible outside the 'if' block.
Q
What will be the output of the following code: if (true) { let b = 60; } console.log(b);
Related Questions on Average
What will be the output of the following code: var e = 110; if (true) { var e = 120; } console.log(e);
A). 110
B). 120
C). Error
D). undefined
Which keyword allows block-scoped variable declaration?
A). var
B). let
C). const
D). Both B and C
How does 'let' differ from 'var' in terms of scope?
A). No difference
B). Function-scoped
C). Block-scoped
D). Global-scoped
What will be the output of the following code: const d = 90; d = 100; console.log(d);
A). 90
B). 100
C). Error
D). undefined
What will be the output of the following code: let y = 10; let y = 20; console.log(y);
A). 10
B). 20
C). Error
D). undefined
Which keyword is used for declaring variables that should not change?
A). var
B). let
C). const
D). all of the above
Which keyword should be used by default to declare variables in modern JavaScript?
A). var
B). let
C). const
D). Either B or C
Which of the following statements is true about 'const'?
A). It allows re-declaration
B). It allows reassignment
C). It is block-scoped
D). It is function-scoped
What is the default scope of variables declared with the 'var' keyword in JavaScript?
A). Block scope
B). Function scope
C). Module scope
D). Block and function scope
Can 'const' be used to declare an array or object?
A). No, only primitives
B). Yes, but the reference can't change
C). Yes, and the content can't change
D). No