object Main {
def main(args: Array[String]): Unit = {
val n: Int = 89
// create text labels for each possible case
val result = Array(
"negative", // index 0
"zero", // index 1
"positive" // index 2
)
// compute an index without using any conditional statements
// Math.signum(n) returns:
// -1 for negative
// 0 for zero
// +1 for positive
// index = 1 + Math.signum(n)
val index: Int = 1 + Math.signum(n.toDouble).toInt
// print the classification
println(result(index))
/*
Checks:
n = -3
Math.signum(n) = -1
index = 1 + (-1) = 0
result = negative
n = 0
Math.signum(n) = 0
index = 1 + 0 = 1
result = zero
n = 89
Math.signum(n) = 1
index = 1 + 1 = 2
result = positive
*/
}
}
/*
run:
positive
*/
