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") { println("Follow the lower river.") 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
In order to be considered a planet, a celestial body must accomplish three things according to the International Astronomical Union:
- Must orbit a star (like the sun).
- Must have enough mass in order to achieve hydrostatic equilibrium (a nearly round shape).
- 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.
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."
Underneath the nested if
expression, create an else
expression that outputs "Celestial body is a dwarf planet."
using a println()
statement.