lowercaseChar
Converts this character to lower case using Unicode mapping rules of the invariant locale.
This function performs one-to-one character mapping. To support one-to-many character mapping use the lowercase function. If this character has no mapping equivalent, the character itself is returned.
import java.util.*
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val chars = listOf('A', 'Ω', '1', 'a', '+', 'İ')
val lowercaseChar = chars.map { it.lowercaseChar() }
val lowercase = chars.map { it.lowercase() }
println(lowercaseChar) // [a, ω, 1, a, +, i]
println(lowercase) // [a, ω, 1, a, +, \u0069\u0307]
//sampleEnd
}