Conditional let us determine when we do what
Using conditionals allows us to protect code from executing until the proper conditons are met.
Think of conditionals a way of putting a wall around a walled city. Your city has a gate, but you hold the power to open that gate from the right people
Let's look at an example:
var age = 18
if (age < 21) {
console.log('Sorry kid, I can't serve you')
}
In this example, a comparing two number, if age is less than (<) 21 we excute the console.log within the brackets. In the age the expression age < 21 evaluates to true.