gawk: Function Caveats

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1 9.2.3 Calling User-Defined Functions
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1 "Calling a function" means causing the function to run and do its job.
1 A function call is an expression and its value is the value returned by
1 the function.
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Menu

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· Calling A Function          Don't use spaces.
· Variable Scope              Controlling variable scope.
· Pass By Value/Reference     Passing parameters.
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