JavaScript Foundations

Lesson 2: Variables and Types

Now we store real values in variables and print them clearly.

Learning Goals

Create variables with let.
Update variable values.
Use typeof to check a data type.

Example

When we write this, we mean each variable stores one piece of information.

// Save as lesson2.js
let internName = "Patricia";
let week = 1;
let isPresent = true;

week = week + 1;

console.log(internName);
console.log(week);
console.log(isPresent);
console.log(typeof internName);
console.log(typeof week);

Keep it simple: use only let for now in this track.

Tip: Run node lesson2.js in your terminal.

Practice

Create a variable for your school name.
Create a variable for your age and add 1.
Create a true/false variable for isMorning.

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