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• Inputs:
  • For transformations, inputs are called parameters.
  • For functions, inputs are called arguments.
• Function names are written in ALL CAPS.
• Square brackets [like this] indicate optional parameters or arguments.
• Parentheses are used:
  • To bracket function inputs
  • To bracket expressions, such as myCol >= 4. In some of these instances, parentheses may be optional. 
• A vertical pipe (|) may be used between parameters or arguments that are paired. Typically, one of them may be used, but not both.