Introduction to JavaScript – Create a Variable: const

Bernard Aybout

5 years ago

Introduction to JavaScript – Create a Variable: const

Let’s dive in and see a variable in the wild. Here is how you declare a constant variable:


const myName = 'Seth';
console.log(myName);
// Output: Seth

Let’s consider the example above:

1) const, short for constant, is a JavaScript keyword that creates a new variable with a value that cannot change.

2) myName is the variable’s name. Notice that the word has no spaces, and we capitalized the N. Capitalizing in this way is a standard convention in JavaScript called camelCasing because the capital letters look like the humps on a camel’s back.

3) = is the assignment operator. It assigns the value (‘Seth‘) to the variable (myName).

4) ‘Seth‘ is the value assigned (=) to the variable myName.
After the variable is declared, we can print ‘Seth‘ to the console with console.log(myName).

You can save any data type in a variable. For example, here we save numbers:


const myAge = 11;
console.log(myAge);
// Output: 11

In the example above, on line 1 the myAge variable is set to 11. Below that, console.log() is used to print 11 to the console.

Introduction to JavaScript – Create a Variable: const

Introduction to JavaScript – Create a Variable: const

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