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How can I read an integer value from the user to use in the range of a for loop?

fun main() { var n = readLine() for (i in 1..n) { var (a, b) = readLine()!!.split(' ') println(a.toInt() + b.toInt()) } }
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You can use the String.toInt() function to achieve this (the same thing that you doing in later lines).

Like this:

fun main() { val n = readLine()!!.toInt() for (i in 1..n) { val (a, b) = readLine()!!.split(' ') println(a.toInt() + b.toInt()) } }

Also, you can replace your vars with vals since they are not changed anywhere.

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