Unit 6 : Repetition Structure

Question 1

What is counter based looping?

Answer 1

1. Known number of iteration

Question 2

Examples of counter based looping ( 2 )

Answer 2

1. While
2. For

Question 3

What is sentinel based looping ?

Answer 3

1. Unknown number of iteration

Question 4

Examples of sentinel based looping

Answer 4

1. while

Question 5

What is counter based loops also called?

Answer 5

1. definite loops

Question 6

What is the difference between break and continue?

Answer 6

1. break - ends the loop and jumps to the statement
2. continue - ends the current iteration and jumps to the top of the loop and starts the next iteration

Question 7

How can we create a definite loop with string?

Answer 7

friends = [“Joseph”,”Glenn”,”Sally”]

for i in friends:
print(friends)
print(“Done”)

Question 8

How can we sum inside a loop?

Answer 8

val = 0
print (“Before”, val)
for num in [9, 41, 12, 3, 74, 15] :
val = val + num
print (val, num)
print (“After”, val)

Before 0
9 9
50 41
62 12
65 3
139 74
154 15
After 154

Question 9

How can we find the average inside a loop?

Answer 9

count = 0
sum = 0
print (“Before”, count, sum)
for value in [9, 41, 12, 3, 74, 15]:
count = count + 1
sum = sum + value
print (count, sum, value)
print (“After”, count, sum, sum / count)

Question 10

How can we filter a loop?

Answer 10

print “Before”
for value in [9, 41, 12, 3, 74, 15]:
if value > 20:
print (“Large number”,value)
print (“After”)

Question 11

How can we find using a boolean variable

Answer 11

found = False
print (“Before”, found)
for value in [9, 41, 12, 3, 74, 15]:
if value == 3 :
found = True
print (found, value)
print (“After”, found)

Question 12

How can we find the smallest number?

Answer 12

smallest = None
print (“Before”)
for value in [9, 41, 12, 3, 74, 15]:
if smallest is None :
smallest = value
elif value < smallest :
smallest = value
print (smallest, value)
print (“After”, smallest)