Constants
Constants are similar to variables however their value, as expressed by the name, is always constant or unchanged.
We can declare a constant using the const keyword, and it's important to initialize it at the same point as well. Following is the syntax for constant declaration & initialization:
const constantName = data;
For example:
const exampleConstant = 123;
Changing the value of a constant results in an error:
const exampleConstant = 123;
exampleConstant = 1234; // Error here
The names of the constants follow the same naming rules as the variables.
1. What is a constant in JavaScript?
2. Which keyword is used to declare a constant in JavaScript?
3. What happens if you try to reassign a value to a constant?
4. Which of the following correctly declares and initializes a constant in a single statement?
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Constants are similar to variables however their value, as expressed by the name, is always constant or unchanged.
We can declare a constant using the const keyword, and it's important to initialize it at the same point as well. Following is the syntax for constant declaration & initialization:
const constantName = data;
For example:
const exampleConstant = 123;
Changing the value of a constant results in an error:
const exampleConstant = 123;
exampleConstant = 1234; // Error here
The names of the constants follow the same naming rules as the variables.
1. What is a constant in JavaScript?
2. Which keyword is used to declare a constant in JavaScript?
3. What happens if you try to reassign a value to a constant?
4. Which of the following correctly declares and initializes a constant in a single statement?
Kiitos palautteestasi!
