ch3

Question 1

control structure

Answer 1

is a logical design that controls the order in which a set of statements execute

Question 2

the if statement executes when

Answer 2

boolean is true

Question 3

when a program compares characters it is actually comparing …

Answer 3

ASCII CODES

Question 4

the if statement is a BLANK

the if else statement is a BLANK

Answer 4

single alternative decision

dual alternative decision

Question 5

the and and or operators will stop evaluating if the expression on the left is false this called

Answer 5

short circuit evaluation

Question 6

and or and not are BLANK operators

Answer 6

logical

Question 7

compound boolean expression is true only when both subexpression are true

BLANK OPERATOR

Answer 7

and

Question 8

compound boolean is true is either subexpression are true is

Answer 8

or

Question 9

boolean variables are commonly used as BLANK and if it is set to BLANK it indicates the condition does not exist

Answer 9

flags

False

Question 10

A BLANK is a boolean variable that signals when some condition exists in the program

Answer 10

flag

Question 11

what operator is best used to determine whether a number is inside a range?

Answer 11

or operator

Question 12

name 3 control structures

and can you use more than one in a program?

Answer 12

sequence
decision or selection which include single and dual alternative decision structures

yes more than one type of structure can be used

Question 13

what are sone relational operators

Answer 13

greater than /equal
less than/equal
equal to
not equal to

Question 14

short circuit evaluation

Answer 14

affects and and or operators

for and operators
if the expression on the left side of the operator is false the right side will not be checked because the compound expression will be false if only one of the subexpressions is false

for or operators
if the expression on the left side of the operator is true the right side will not be checked because the compound expression will be true if only one of the subexpressions is true

this saves cpu time

Question 15

what does a nest if else statement look like?

Answer 15

if
else
  if
  else
    if
    else

or using elif

if
elif
elif
elif
else

Question 16

describe how and operator works

Answer 16

takes two Boolean expressions as operands and creates a compound expression that is true only when both subexpressions are true

Question 17

describe how the or operator works

Answer 17

takes two boolean expression and creates compound expression that is true when either subexpressions are true