PYTHON PROGRAMMING 10

PART 4 – LOOPS

PROGRAMS

PROGRAM 1 – OUTPUT NUMBERS 1 TO 10

for x in range(1, 10):

     print(x)
# start at 1
# end BEFORE 10

PROGRAM 2A – ODD NUMBERS BETWEEN 1 & 10

for x in range(1, 10, 2):
 print(x)
 
# start at 1
# end BEFORE 10
# increase by 2

PROGRAM 2B – EVEN NUMBERS BETWEEN 1 & 10

for x in range(2, 101, 2):
 print(x)
 
# start at 2 (first even number)
# end BEFORE 11
# increase by 2

TASK 1

a) Use a for loop to output all whole numbers between 17 and 25 inclusively.

b) Use a for loop to output all odd numbers from 32 to 45 inclusively.

c) Use for loop to output all numbers from 10 down to 5 (backwards).

PROGRAM 3A – MULTIPLE MESSAGES

for coco in range(1, 5):
 print("I love school!")

PROGRAM 3B – MULTIPLE LOOPS

for a in range(1, 4):
 print("Hey")
for b in range(1, 4):
 print("Ho") 
for c in range(1, 4):
 print("Ha")

TASK 2

Write a program that asks the user for a message and then for a number of times to display that message. It then prints that message to screen the number of times specified.

SAMPLE IO

Enter a message. Campeau is cool!

How many times should I display this? 3

Campeau is cool!

Campeau is cool!

Campeau is cool!

PROGRAM 4 – LARGER BLOCK

for x in range(1, 6):
 print("The number:", x)
 print("Its double:", x * 2)
 print("Its half:", x / 2)
 print("Its square:", x * x)
 print("=====")

PROGRAM 5 – SENTENCE BUILDING GAME

turn = 1
sentence = ""
for x in range (0,8): #8 passes
 print("==============")
 print("Sentence:", sentence)
 if turn == 1:
 print("Player 1, add a word")
 turn = 2
 else:
 print("Player 2, add a word")
 turn = 1
 word = input("Word to add:")
 sentence = sentence + " " + word
print("***************")
print(sentence)

PROGRAM 6 – INTRODUCING WHILE

num = 1
while num <= 10:
 print(num)
 num = num + 1 #try removing this line
print("done")

TASK 3

Use a while loop to output all numbers from 10 to 20 on the screen.

PROGRAM 7 – LOOPING BASED ON USER DECISIONS

keepGoing = True
total = 0
while keepGoing == True:
 value = int(input("Enter a
number (-1 escapes)"))
 if value == -1:
 keepGoing = False
 else:
 total = total + value
print("The total is", total)

TASK 4

Associate each program description with a program below.

1) This program will output every fifth number from 0 to 100.

2) This program will output all odd numbers from 1 to 9 on the screen.

3) This program will output the numbers 1 to 4 on the screen.

4) This program will output numbers 1 to 5 on the screen.

5) This program will actually output nothing to screen because of a logical error.

6) This program will output the word coco on the screen four times.

a)

for coco in range(1, 5):
 print(coco)

b)

for x in range(1,10,2):
 print(x)

c)

for coco in range(1, 5):
 print("coco")

d)

a = 0
while a >= 100:
 print(a)
 a = a + 5

e)

z = 1
while z <= 5:
 print(z)
 z = z + 1

f)

a = 0
while a <= 100:
   print(a)
 a = a + 5

OUT