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Variables

Create a Variable: let

As mentioned in the previous exercise, the let keyword was introduced in ES6. The let keyword signals that the variable can be reassigned a different value. Take a look at the example:

let meal = 'Enchiladas'; console.log(meal); // Output: Enchiladas meal = 'Burrito'; console.log(meal); // Output: Burrito

Another concept that we should be aware of when using let (and even var) is that we can declare a variable without assigning the variable a value. In such a case, the variable will be automatically initialized with a value of undefined:

let price; console.log(price); // Output: undefined price = 350; console.log(price); // Output: 350

Notice in the example above:

  • If we don't assign a value to a variable declared using the let keyword, it automatically has a value of undefined.
  • We can reassign the value of the variable.
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