Python Loops

In programming, what is iteration/looping?

• The repetition of steps within a program

• The order in which instructions are carried out

• A decision point in a program

Why is iteration important?

• It determines the order in which instructions are carried out
• It allows code to be simplified by removing duplicated steps
• It allows multiple paths through a program

What is iteration known as?

• Looping
• Crashing
• Repeating

numbers = [5, 14, 9, 17]

for number in numbers:

if number % 3 == 0:

print(number)

The output will be?

• 17

• 9

• 14

  9

  17

• 14

  17

numbers = [5, 14 ,9, 17]

for number in numbers:

if number >= 9:

print (number)

The output will be?

• 17

• 9

• 14

  9

  17

• 14

  17

Which of the following will print:

• for i in range(1, 5):   
  print(str(i) * 5)
• for i in range(1, 5):   
  print("i" * i)
• for i in range(1, 6):   
  print("i" * i)
• for i in range(1, 6):   
  print(str(i) * i)

What will be printed after running this FOR loop:

for number in range(6):  
    print(number)

• The number 6 
• The numbers 0 - 5
• The number 5
• The numbers 1 - 6

How many times does the following program print the word ‘computer’:

word= "computer"  
for num in range(1,6):  
    print(word)

• 5
• 6
• 1
• 0

Which of the following programs prints ten lines?

• for i in range(10):

  print("hi")

• for i = 1 to 10:

  print("hi")

• for i in 1 - 10:

  print("hi")

• for i from 0 to 9:

  print("hi")

Which of the following best describes the purpose of a for loop?

• A for loop is for doing something an indeterminate number of times.

• A for loop is doing something an infinite number of times.

• A for loop is for doing something a fixed number of times.

• A for loop is for doing something three times.