I'm a PL/I novice, or less. A recent thread here moved me to browse the Ref., where I read that any constant used more than once must be declared and the identifier used instead. Sorta tyrannical enforcement of coding conventions. OK. I agree that 6.62607015e−34 shouldn't be hard-coded more than once. But SQRT( X**TWO + Y**TWO )? Ugh!
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