schwartz's questions

In Scala , why would such an expression return AnyVal? (I was expecting a boolean)

if (expr0)
    if ((expr1)&&(expr2))
        true
    else if (expr3)
        false
    else
        recFun(arg0, arg1)

Note 1: recFun is a recursive function...

Note 2: It is the last line of the recursive function itself...