py4e Chapter 3

Question 1

body

Answer 1

The sequence of statements within a compound statement

Question 2

boolean expression

Answer 2

An expression whose value is either True or False

Question 3

branch

Answer 3

One of the alternative sequences of statements in a conditional statement.

Question 4

chained conditional

Answer 4

A conditional statement with a series of alternative branches.

Question 5

comparison operator

Answer 5

One of the operators that compares its operands: ==,

!=, >, =, and <=.

Question 6

conditional statement

Answer 6

A statement that controls the flow of execution depending on some condition.

Question 7

condition

Answer 7

The boolean expression in a conditional statement that determines which branch is executed.

Question 8

compound statement

Answer 8

a statement that consists of a header and a body. the header ends with a colon (:). The body is indented relative to the header.

Question 9

guardian pattern

Answer 9

Where we construct a logical expression with additional comparisons to take advantage of the short-circuit behavior.

Question 10

Logical operator

Answer 10

One of the operators that combines boolean expressions: and, or, and not.

Question 11

nested conditional

Answer 11

A conditional statement that appears in one of the branches of another conditional statement.

Question 12

Traceback

Answer 12

a list of the functions that are executing, printed when an exception occurs.

Question 13

Short circuit

Answer 13

When python is part-way through evaluating a logical expression and stops the evaluation because Python knows the final value for the expression without needing to evaluate the rest of the expression.