listkotlincharacterdata-conversion

How do I convert a Char to Int?

So I have a String of integers that looks like "82389235", but I wanted to iterate through it to add each number individually to a MutableList. However, when I go about it the way I think it would be handled:

var text = "82389235"

for (num in text) numbers.add(num.toInt())

This adds numbers completely unrelated to the string to the list. Yet, if I use println to output it to the console it iterates through the string perfectly fine.

How do I properly convert a Char to an Int?

Solution

  • That's because num is a Char, i.e. the resulting values are the ascii value of that char.

    This will do the trick:

    val txt = "82389235"
val numbers = txt.map { it.toString().toInt() }

    The map could be further simplified:

    map(Character::getNumericValue)