exponential in kotlin
fun power(base: Int, exponent: Int): Long {
require(exponent >= 0) { "Exponent must be non-negative" }
var result: Long = 1
var exp = exponent
var b = base.toLong()
while (exp > 0) {
if (exp % 2 == 1) {
result *= b
}
exp /= 2
b *= b
}
return result
}
fun main() {
val base = 2
val exponent = 5
val result = power(base, exponent)
println("$base^$exponent = $result")
}