isLowerCase

Common
JVM
JS
1.0
fun Char.isLowerCase(): Boolean
(Common source) (JVM source) (JS source)

Returns true if this character is lower case.

A character is considered to be a lower case character if its category is CharCategory.LOWERCASE_LETTER, or it has contributory property Other_Lowercase as defined by the Unicode Standard.

import java.util.*
import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val chars = listOf('a', 'λ', 'A', '1', '+')
val (lowerCases, notLowerCases) = chars.partition { it.isLowerCase() }
println(lowerCases) // [a, λ]
println(notLowerCases) // [A, 1, +]
//sampleEnd
}