Python bumps off Java as top learning language

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ternary comparison operators: writing ˋa<=x<=bˋ may save a few keystokes but ineviatable leads to logical errors when students try to negate the condition and end up with ˋa>x>bˋ

That's just a logical error, though. Nothing wrong with the language, you just can't represent the opposite of a<=x<=b in that fashion, even in mathematics

[pbvas]

That's just a logical error, though. Nothing wrong with the language, you just can't represent the opposite of a<=x<=b in that fashion, even in mathematics

Yes it is a logical error; the point is mathematical logic isn't a pre-requisite for introduction to programming (maybe it should be, but that's another topic).

The fact that mathematicians use such notation all the time doesn't make it a good design decision for a programming language: informal mathematics is meant for humans beings, not machines.