Android Kotlin Digest #2

Back again with Kotlin I learnt.

Kotlin runs on Java Virtual Machine (JVM).

Syntax for declaring variables:
Mutable:     var name: Type = value
Immutable: val name: Type = value

Type	Bit width
Double	64
Float	32
Long	64
Int	32
Short	16
Byte	8

Kotlin 1.1 supports underscores ( _ ) in numeric values for readability:
val mySalary = 1_000_000
val myCreditCardBill = 20_000


Difference between == and === :
val a : Int = 10
val b : Int = 10
(a == b) // gives true 
(a === b) // gives true 
Note: Here primitive types are compared.

When the primitive types are nullable it is turned into references and following is the result:
val a : Int? = 10
val b : Int? = 10
(a == b) // gives true 
(a === b) // gives false 
Note: Here a and b becomes references and hence comparision with === results false.

Type converters:
'c'.toInt()
80.toString()

A raw string is delimited by a triple quote ("""), contains no escaping and can contain newlines and any other characters:
val text = """
    for (c in "foo")
        print(c)
"""

You can remove leading whitespace with trimMargin() function:
val text = """
    |Tell me and I forget.
    |Teach me and I remember.
    |Involve me and I learn.
    |(Benjamin Franklin)
""".trimMargin()



-- Happy Coding --