Arithmetic/Integer: Difference between revisions

=={{header|Kotlin}}==

<lang scala>// version 1.0.5-2

fun main(args: Array<String>) {

val r = Regex("""-?\d+[ ]+-?\d+""")

while(true) {

print("Enter two integers separated by space(s) or q to quit: ")

val input: String = readLine()!!.trim()

if (input == "q" || input == "Q") break;

if (!input.matches(r)) {

println("Invalid input, try again")

continue

}

val index = input.lastIndexOf(' ')

val a = input.substring(0, index).trimEnd().toLong()

val b = input.substring(index + 1).toLong()

println("$a + $b = ${a + b}")

println("$a - $b = ${a - b}")

println("$a * $b = ${a * b}")

if (b != 0L) {

println("$a / $b = ${a / b}") // rounds towards zero

println("$a % $b = ${a % b}") // if non-zero, matches sign of first operand

}

else {

println("$a / $b = undefined")

println("$a % $b = undefined")

}

val d = Math.pow(a.toDouble(), b.toDouble())

print("$a ^ $b = ")

if (d % 1.0 == 0.0) {

if (d >= Long.MIN_VALUE.toDouble() && d <= Long.MAX_VALUE.toDouble())

println("${d.toLong()}")

else

println("out of range")

}

else if (!d.isFinite())

println("not finite")

else

println("not integral")

println()

}

}</lang>

{{out}}

<pre>

Enter two integers separated by space(s) or q to quit: 2 63

2 + 63 = 65

2 - 63 = -61

2 * 63 = 126

2 / 63 = 0

2 % 63 = 2

2 ^ 63 = 9223372036854775807

Enter two integers separated by space(s) or q to quit: -3 50

-3 + 50 = 47

-3 - 50 = -53

-3 * 50 = -150

-3 / 50 = 0

-3 % 50 = -3

-3 ^ 50 = out of range

Enter two integers separated by space(s) or q to quit: q

</pre>