Constants in Latex

Go supports *constants* of character, string, boolean, and numeric values.

```kotlin
const val s: String = "constant"

fun main() {
    println(s)
    const val n = 500000000
    val d = 3e20 / n
    println(d)
    println(d.toLong())
    println(math.sin(n.toDouble()))
}

const declares a constant value.

A const statement can appear anywhere a var statement can.

Constant expressions perform arithmetic with arbitrary precision.

A numeric constant has no type until it’s given one, such as by an explicit conversion.

A number can be given a type by using it in a context that requires one, such as a variable assignment or function call. For example, here math.sin expects a Double.

$ kotlinc constants.kt -include-runtime -d constants.jar
$ java -jar constants.jar
constant
6.0E11
600000000000
-0.28470407323754404

Next example: For.