How to convert char to ascii value in kotlin language

Question

I am developing an android application with kotlin in which I need to convert an string character to its ASCII value,

fun tryDiCript(cypher: String) :String {
        var cypher = "fs2543i435u@$#g#@#sagb@!#12416@@@"
        var originalText = ""

        var regEx =Regex("[a-z]")
        for(char in  regEx.findAll(cypher))
        {                 
            originalText += (char.value.toInt()).toString()            
        }
       return originalText
}

this tutorial website showed me to use char.toInt() but it gives runtime error saying

Caused by: java.lang.NumberFormatException: Invalid int: "u"

so how if anyone knows hot to convert char to ASCII value please help me.

Answer 1

char.value is a String. When you call String.toInt(), it is expecting a numeric string such as "1", "-123" to be parsed to Int. So, "f".toInt() will give you NumberFormatException since "f" isn't a numeric string.

If you are sure about char.value is a String containing exactly one character only. To get the ascii value of it, you can use:

char.value.first().code