Lists & Evaluation

• Unless QUOTEd, a list of the form

  • (S1 S2 S3 ... Sn)

is assumed to represent a call to the function S1 with arguments S2, S3, ..., Sn

• Scheme does the following:

  • evaluates S1 by looking up its function definition
  • evaluates the arguments S2, S3, ..., Sn
  • applies the function definition to the evaluated arguments

• Apart from a number of special forms, e.g., conditional statements, all Scheme expressions have this general form

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