BigInteger in Kotlin

Question

I need to make use of BigInteger but can't find anything similar in kotlin.

Is there any alternative class in kotlin to BigInteger of java?

or

should I import java class into kotlin?

Answer 1

java.math.BigInteger can be used in Kotlin as any other Java class. There are even helpers in stdlib that make common operations easier to read and write. You can even extend the helpers yourself to achieve greater readability:

import java.math.BigInteger

fun Long.toBigInteger() = BigInteger.valueOf(this)
fun Int.toBigInteger() = BigInteger.valueOf(toLong())

val a = BigInteger("1")
val b = 12.toBigInteger()
val c = 2L.toBigInteger()

fun main(argv:Array<String>){
    println((a + b)/c) // prints out 6
}