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Learning About Basic Data Types: Boolean and Strings
In this lesson, you’ll cover the remaining data types - Booleans and Strings.
Boolean
The Boolean data type can be only one of two types: true or false. This makes it suitable for representing data that can only be in two states. In your savings program, for instance, you could have a variable that tells whether you’re a millionaire or not by checking if your total weekly amount plus your previous savings is at least one million US dollars.
...
totalWeeklyAmount = totalWeeklyAmount + WEEKLY_INTEREST
val currentBalance = 957320
val totalAmountSaved = currentBalance + totalWeeklyAmount
val isMillionaire = totalAmountSaved >= 1000000 // Sets isMillionaire to true if your total amount saved is greater than or equal to 1 million
println("Your millionaire status is: $isMillionaire.")
...
Character
Characters represent single-character symbols and numbers. They’re represented in Kotlin by the Char class. They’re instantiated using single quotes '. See the following examples:
val grade = 'A'
String
Strings represent text. Strings are, in effect, a sequence of characters put together. In Kotlin, they’re defined by the String class. They’re initialized with double quotes ". Strings are widely used in software programming. Every object in Kotlin has a string representation.
val message = "End of the program!\nSee you next week." // "\n" is a special character which represents a new line.
println(message)
End of the program
See you next week.
val message = """
End of the program!
See you next week.
"""
println(message)
End of the program
See you next week.