Which of the following statements about JavaScript constants is true?AConstants are variables whose value cannot be changed once they have been assigned.BConstants can be reassigned to a different value later in the code.CConstants are declared with the let keyword.DConstants are only used for storing numbers and strings.
Question
Which of the following statements about JavaScript constants is true?AConstants are variables whose value cannot be changed once they have been assigned.BConstants can be reassigned to a different value later in the code.CConstants are declared with the let keyword.DConstants are only used for storing numbers and strings.
Solution
The correct statement about JavaScript constants is A: Constants are variables whose value cannot be changed once they have been assigned.
Here's why:
A. This is true. In JavaScript, a constant is a type of variable whose value cannot be changed once it has been assigned. This is done using the const keyword.
B. This is false. Once a value has been assigned to a constant in JavaScript, it cannot be changed or reassigned.
C. This is false. Constants in JavaScript are declared using the const keyword, not the let keyword. The let keyword is used to declare variables that can be reassigned.
D. This is false. Constants in JavaScript can hold all types of values, not just numbers and strings. They can hold objects, arrays, and other data types as well.
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