You&#x27;re right as far as you go, but it&#x27;s not an all-or-nothing thing. Most languages won&#x27;t let you write mathematics <i>exactly</i> like mathematicians do, but the closer you can get the better. For many cases avoiding infix entirely would be a big cost.<p>(FWIW Scala allows postfix operators, though you&#x27;d have to put the n! in brackets)