// vars

var mutableBeverage = "Leffe"
println(mutableBeverage) // "Leffe"

mutableBeverage = "Bud"
println(mutableBeverage) // "Bud"

mutableBeverage = mutableBeverage + "weiser"
println(mutableBeverage) // "Budweiser"

// lets

let immutableBeverage = "Bud"
println(immutableBeverage) // "Bud"

immutableBeverage = "Leffe" // Compiler error

immutableBeverage = immutableBeverage + "weiser" // Compiler error