How can you prevent a JavaScript variable from being modified after its initial assignment?OptionsUse the final keywordUse the let keywordUse the const keywordUse the var keyword
Question
How can you prevent a JavaScript variable from being modified after its initial assignment?OptionsUse the final keywordUse the let keywordUse the const keywordUse the var keyword
Solution
You can prevent a JavaScript variable from being modified after its initial assignment by using the const keyword. Once a variable is assigned with const, it cannot be reassigned. Here's how you can do it:
-
Declare the variable: You start by declaring a variable using the const keyword. For example,
const myVariable; -
Assign a value: After declaring, you need to assign a value to the variable. For example,
const myVariable = "Initial value";
Remember, you have to assign a value to the const variable at the time of declaration. If you try to declare it without assigning a value, JavaScript will throw an error.
Also, if you try to reassign a value to the const variable, JavaScript will throw an error. For example, if you try myVariable = "New value"; after the initial assignment, JavaScript will not allow it.
So, the correct option is "Use the const keyword".
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What does const mean? (please check all true answers)It’s the keyword to define a variable in the local scopeIt’s the keyword to define a variable with optionally initializing it to a valueIt’s the keyword to define a global variableIt’s the keyword to define a constant variableIt’s the keyword to define a variable that can be re-assign during the executionSubmit answers
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