Course Review
Congratulations! You've finished the course and have mastered the beginning concepts. We've covered a lot of material, and now it's time for two final practice exercises where you will see how to use JavaScript to solve real-world problems. The first exercise reviews "assignment", "declaration", and "conditional statements" like if/else and switch, and "comparison" and "logical" operators using interactive examples.
Final Practice Exercise Review
nesting if ... else
It is perfectly OK to put one if...else statement inside another one — to nest them. For example, we could update our weather forecast application to show a further set of choices depending on what the temperature is:
if (choice === 'sunny') {
if (temperature < 86) {
para.textContent = 'It is ' + temperature + ' degrees outside — nice and sunny. Let\'s go out to the beach, or the park, and get an ice cream.';
} else if (temperature >= 86) {
para.textContent = 'It is ' + temperature + ' degrees outside — REALLY HOT! If you want to go outside, make sure to put some sunscreen on.';
}
}Even though the code all works together, each if...else statement works completely independently of the other one.