Getting the number of decimal places: Difference between revisions

=={{header|Kotlin}}==

{{trans|Java}}

<lang scala>fun findNumOfDec(x: Double): Int {

val str = x.toString()

if (str.endsWith(".0")) {

return 0

}

return str.substring(str.indexOf('.')).length - 1

}

fun main() {

for (n in listOf(12.0, 12.345, 12.345555555555, 12.3450, 12.34555555555555555555, 1.2345e+54)) {

println("%f has %d decimals".format(n, findNumOfDec(n)))

}

}</lang>

{{out}}

<pre>12.000000 has 0 decimals

12.345000 has 3 decimals

12.345556 has 12 decimals

12.345000 has 3 decimals

12.345556 has 15 decimals

1234500000000000000000000000000000000000000000000000000.000000 has 7 decimals</pre>