1.1.1 Expressions

Question 1

combinations

Answer 1

Expressions representing numbers that are combined with an expression representing a primitive procedure (such as * or +) to form a compound expression that represents the application of the procedure to those numbers.

Question 2

The values to which an operation is being performed

Answer 2

operands

Question 3

The type of operation being performed

Answer 3

operator

Question 4

The convention of placing the operator to the left of the operands

Answer 4

prefix notation

Question 5

What are the advantages of prefix notation?

Answer 5

1. no ambiguity
2. nested combinations

1. opeator is always the leftmost element and the entire combination is delimited by paranthesis
2. there is no limit (in principle) to the depth of such nesting and overall complexity of the expressions that the interpreter can evaluate

Question 6

Formatting convention in which each long combination is written so that the operands are aligned vertically.

Answer 6

pretty-printing