let sober = true;
let isSober = () => {
    console.log('This person is completely sober.');
}
let isDrunk = () => {
    console.log('This person had too much alcohol.');
}

// A normal if statement
if(sober) isSober(); // This person is completely sober.

// Above can be done using '&&' operator

sober && isSober(); // This person is completely sober.

// Using logical OR - '||' operator
sober = false;
// A normal if statement
if(!sober) isDrunk(); // This person had too much alcohol.

sober || isDrunk(); // This person had too much alcohol.

// In this specific example, the logical OR could also be used to set a defalt value

const getBio = (name, year, breed) => {
    name = name || 'John';
    year = year || 2018;
    breed = breed || 'Beagle';
}