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Conditional Expressions
Nested Conditionals

Similar to the concept of a “dream inside of a dream” from the movie Inception, a conditional can exist inside of another conditional. This occurrence is called a nested conditional.

By nesting a conditional inside of another conditional, we can achieve more complex and precise logical solutions.

For example, remember Conditional Creek? We can use a nested conditional to replicate this situation:

``````var sailColor = "red"
var sailPattern = "striped"

if (sailColor == "red") {
if (sailPattern == "striped") {
println("Then take the right path.")
} else {
println("Then take the left path.")
}
} else {
println("Take the higher river.")
}``````

The first conditional checks the truth value of `sailColor` while the nested conditional checks the truth value of `sailPattern`. This program will output the following:

``````Follow the lower river.
Then take the right path.``````

### Instructions

1.

In order to be considered a planet, a celestial body must accomplish three things according to the International Astronomical Union:

1. Must orbit a star (like the sun).
2. Must have enough mass in order to achieve hydrostatic equilibrium (a nearly round shape).
3. Must have enough mass to clear debris/small objects from its orbit.

The difference between a planet and a dwarf planet comes from rule 3.

In Planet.kt create an `if` expression that checks if `orbitsStar` AND `hydrostaticEquilibrium` are `true`.

Leave the body of the `if` expression blank for now.

2.

Inside the `if` expression, create a nested conditional that checks if the value of `clearedOrbit` is `true`.

Inside the body of this nested `if` exression, create a `println()` statement that outputs `"Celestial body is a planet."`

3.

Underneath the nested `if` expression, create an `else` expression that outputs `"Celestial body is a dwarf planet."` using a `println()` statement.