Dynamic variable names: Difference between revisions

=={{header|Kotlin}}==

Kotlin is a statically typed, compiled language and so it is not possible to create new variables, dynamically, at run time. However, you can make it look to the user like you are doing so with code such as the following which uses a map:

{{trans|FreeBASIC}}

<lang scala>// version 1.0.6

fun main(args: Array<String>) {

var n: Int

do {

print("How many integer variables do you want to create (max 5) : ")

n = readLine()!!.toInt()

}

while (n < 1 || n > 5)

val map = mutableMapOf<String, Int>()

var name: String

var value: Int

var i: Int = 1

println("OK, enter the variable names and their values, below")

do {

println("\n Variable $i")

print(" Name : ")

name = readLine()!!

if (map.containsKey(name)) {

println(" Sorry, you've already created a variable of that name, try again")

continue

}

print(" Value : ")

value = readLine()!!.toInt()

map.put(name, value)

i++

}

while (i <= n)

println("\nEnter q to quit")

var v: Int?

while (true) {

print("\nWhich variable do you want to inspect : ")

name = readLine()!!

if (name.toLowerCase() == "q") return

v = map[name]

if (v == null) println("Sorry there's no variable of that name, try again")

else println("It's value is $v")

}

}</lang>

Sample input/output:

{{out}}

<pre>

How many integer variables do you want to create (max 5) : 3

OK, enter the variable names and their values, below

Variable 1

Name : faith

Value : 1

Variable 2

Name : hope

Value : 2

Variable 3

Name : hope

Sorry, you've already created a variable of that name, try again

Variable 3

Name : charity

Value : 3

Enter q to quit

Which variable do you want to inspect : chastity

Sorry there's no variable of that name, try again

Which variable do you want to inspect : charity

It's value is 3

Which variable do you want to inspect : q

</pre>