Question

(Write or type in answers, except for problem #15, which should be entered as a small program, tested, and submitted in Repl.it) 1. Write a Python statement to define a list named temps using the following elements, in order: 95, 100, 77, 54, 103, 82 2. a) What is the length of the list temps? b) What Python function can be used to obtain the length of the list? Use it in a statement to obtain the length of temps and assign the value to a variable named length. 3. What is the index position of the value 77? 4. Describe the output of the following statement: print(temps) 5. Show the output of the following statement: print(temps [3] ) 6. Show the output of the following statement: print(temps [2:5]) 7. Write the statement(s) to add another temperature of your choice to the end of the list. 8. Complete the for-loop below to print each element of temps, one at a time: for in print - 9. Using iteration, display each element in temps with a value greater than 100. 10. Using iteration, compute and display the average (type float) of all the elements in the temps list.

Answer 1

1) Python statement to define a list

Statement:

temps=[95,100,77,54,103,82]

Screenshot of the code:

1 2 temps=[95,100,77,54,103,82]

2)length of the list temps

The length of the list temps is 6.

Code:

temps=[95,100,77,54,103,82]
length=len(temps)
print(length)

Screenshot of the code:

1 2 3 4 temps=[95,100,77,54,103,82] length=len(temps) print(length)

Screenshot of the output:

3)index position value of 77

In [2]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') 6

Code:

temps=[95,100,77,54,103,82]
#finding index 
i=temps.index(77)
print(i)

Screenshot of the code:

Screenshot of the output:

1 2 3 4. 5 temps=[95, 100,77,54,103,82] #finding index i=temps.index(77) print(i)

Index position value of 77 is 2.

In [4]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') 2

4)Output of print(temps)

print(temps) will display the list temps

Code:

temps=[95,100,77,54,103,82]
print(temps)

Screenshot of the code:

Screenshot of the output:

1 2 3 temps=[95,100,77,54,103,82] print(temps)

5) Show output of print(temps[3])

In [6]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') [95, 100, 77, 54, 103, 82]

It displays the element which is present at index position 3.

Code:

temps=[95,100,77,54,103,82]
i=temps[3]
print(i)

Screenshot of the code:

Screenshot of the output:

1 2 3 4 temps=[95, 100,77,54,103,82] i=temps [3] print(i)

The value at index position 3 is 54.

In [7]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') 54

6) Output of print(temps[2:5])

It displays the elements from index position 2 to (5-1) that is 2 to 4

Code:

temps=[95,100,77,54,103,82]
print(temps[2:5])

Screenshot of the code:

Screenshot of the output:

1 2 3 temps=[95,100,77,54,103,82] print(temps [2:5])

7) statement to add another temperature at the end of the list

In [8]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') [77, 54, 103]

temps=[95,100,77,54,103,82]
#adding value at the end of the list
temps.append(39)
#printing the list
print(temps)

Screenshot of the code:

Screenshot of the output:

1 2 3 4. 5 6 temps=[95, 100,77,54,103,82] #adding value at the end of the list temps.append(39) #printing the list print(temps)

8) for loop to print the list:

In [9]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') [95, 100, 77, 54, 103, 82, 39]

Code:

temps=[95,100,77,54,103,82]
for i in temps:
    print(i)

Screenshot of the code:

1 2 3 4 temps=[95,100,77,54,103,82] for i in temps: print(i)

Screenshot of the output:

In [10]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') 95 100 77 54 103 82

9) using iteration dispaly the temp>100

Code:

temps=[95,100,77,54,103,82]
for i in temps:
    if(i>100):
        print(i)

Screenshot of the code:

1 2 3 4. 5 temps=[95,100,77,54,103,82] for i in temps: if(i>100): print(i)

Screenshot of the output:

10) avg of the values in temp

In [11]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') 103

temps=[95,100,77,54,103,82]
#finding the length of the list
n=len(temps)
sum=0
#for loop to find the sum pf all values
for i in temps:
    sum=sum+i
#finding the average
avg=sum/n
#displaying average
print(avg)

Screenshot of the code:

Screenshot of the output:

1 2 3 5 temps=[95, 100,77,54,103,82] #finding the length of the list n=len(temps) sum=0 #for loop to find the sum pf all values for i in temps: sum=sum+i #finding the average avg=sum/n #displaying average print(avg) 7 9 10 11 12

11) Trace when the user inputs a value of 5.

In [13]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') 85.16666666666667

Code:

reps=int(input("Enter the number of times you want to display Meteors!"))
n=2
while n<reps:
    print("Meteors!")
    n=n+1

Tracing:

n=2, reps=5

The code in the while loop executes when n<reps

i)n=2,reps=5

while(2<5):

The condition is true . So print Meteors!

n=n+1

n=2+1

n=3

ii)

n=3,reps=5

while(3<5):

The condition is true . So print Meteors!

n=n+1

n=3+1

n=4

iii)

n=4,reps=5

while(4<5):

The condition is true . So print Meteors!

n=n+1

n=4+1

n=5

iv)

n=5,reps=5

while(5<5):

The condition is false. So while loop is terminated.

The word is printed 3 times

12) MCQ

The underlined expression in red is Loop Continuation test.

It checks whether the loop to be continued or stopped.

If the expression is true then the loop continues .

If the expression is false then the loop stops or terminates

13) for loop to define list:

Code:

temps=[i for i in (95,100,77,54,103,82)]
print(temps)

Screenshot of the code:

Screenshot of the output:

1 2 3 temps=[i for i in (95,100,77,54,103,82)] print(temps)

14)Answer:

In [18]: runfile('C:/Users/Sandhya/Spyder programs/s.py', wdir='C:/Users/Sandhya/Spyder programs') [95, 100, 77, 54, 103, 82]

We can't say how many times the loop repeats. I will repeat until the entered is greater than or equal to 20.

When the value is greater than or equal to 20 the loop stops.