atan2 Y,X Returns the arctangent of Y/X in the range -PI to PI. For the tangent operation, you may use the

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getpriority WHICH,WHO Returns the current priority for a process, a process group, or a user. (See getpriority(2).) Will raise a fatal

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lt These operators are documented in perlop.

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map BLOCK LIST map EXPR,LIST Evaluates the BLOCK or EXPR for each element of LIST (locally setting

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