You cannot teach beginners top-down programming, because they don't know which end is up.
Tony HoareProgrammers are always surrounded by complexity; we cannot avoid it.... If our basic tool, the language in which we design and code our programs, is also complicated, the language itself becomes part of the problem rather than part of its solution.
Tony HoareI was eventually persuaded of the need to design programming notations so as to maximize the number of errors which cannot be made, or if made, can be reliably detected at compile time.
Tony Hoare