Delete all letters from String

How can i delete all letters from String?
I’ve got given String:

val stringData ="ABC123.456"

Output value:

val stringData ="123.456"

>Solution :

We can try regex replacement here:

val regex = """[A-Za-z]+""".toRegex()
val stringData = "ABC123.456"
val output = regex.replace(stringData, "")
println(output)  // 123.456