Question

Write, save, and run a Python program that will do the following when run:

Let’s consider the following assignment: a = 1 * 2 + 38 / 8 You want to change the precedence of the operators so that the addition operations are executed first. How would you re-write the assignment? Write a print statement to show the output.

Let’s consider the following assignments: x = 'z' y= ['x', 'z', 'q'] Now, apparently x is a member of y. Write a print statement that should display True- what operator will you use to check if x is a member of y?

Consider the following lines of code. Write the assignment (shown in bold) in the shortcut format and print the result: tax = 15.2 tax = tax - 2.5

Let’s consider this assignment: salary = 55000 vacation = 250 Write a print statement that checks if salary is equal to 55000 and vacation is equal to 200. (What does your print statement return?) -do not use if statement. 2 mark Let’s consider the following assignments: points = 14 Write a print statement that returns the remainder of points divided by 3 using a special operator (not the division one). Write another print statement that returns the integer part of points divided by 3 using a special operator (not the division one)

Round the following number to the precision of 3 digits: 5.2967

Assign values (any- NOT a user input) to the following multiple variables all in one line of code x): The hourly pay rate, number of hours worked and the amount of the tax. Then calculate the net pay by multiplying the rate with hours and subtracting the tax from the result. Output the net pay using the % parameter in the print statement in a right justified with 10 spaces followed by |          (use end parameter for the I)

#Sample run

5

True

12.7

--For Q.4 sample can not be provided –

2

4

5.297

234       |

Please provide code and screenshot of the results.

Answer 1

a) Since Python uses a set of precedence of operators we use () to make + get executed first

# using () so that "+" gets precedence 
a = 1 * (2 + 38) / 8
print(a)

abhijeet@abhijeet:-/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py 5.0 abhijeet@abhijeet:-/python prog$

b) The statement "x in y" asks that if x is a member of the list y

x = 'z'
y= ['x', 'z', 'q']
print(x in y)

abhijeet @abhijeet: -/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py 5.0 abhijeet@abhijeet:-/python_prog$ python3 as1.py True abhijeet@abhijeet:-/python_prog$ |

c) We can use" tax -= 2.5" operator instead of using "tax = tax - 2.5" . They are the same in python.

tax = 15.2
tax -= 2.5
print(tax)

abhijeet@abhijeet: -/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py 15.0 abhijeet@abhijeet:-/python_prog$ python3 as1.py True abhijeet@abhijeet:-/python_prog$ python3 as1.py 12.7 abhijeet@abhijeet:-/python_prog$ ||

d) Using == operator in python means we are checking if both sides of the operator are equal or not. It gives True or False as answer.

salary = 55000
vacation = 250
print(salary == 55000)
print(vacation == 200)

abhijeet@abhijeet:-/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py True False abhijeet@abhijeet:-/python_prog$||

e) We can use %(mod) operator to find the remainder and // operator for the quotient

points = 14
print(points % 3)
print(points // 3)

abhijeet@abhijeet:-/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py 2 4 abhijeet@abhijeet:-/python_prog$||

f) We can use round(value,precision) to round off to the needed digits.

print(round(5.2967,3))

O abhijeet@abhijeet: -/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py 12 4 abhijeet@abhijeet:-/python_prog$ python3 as1.py 5.297 abhijeet@abhijeet:-/python_prog$ |

g) We use a list to take all inputs in one single line

x = [50,5,16]
print("%d          "%(x[0] * x[1] - x[2]),end = '|')

abhijeet@abhijeet: -/python_prog File Edit View Search Terminal Help abhijeet@abhijeet:-/python_prog$ python3 as1.py 234 | abhijeet@abhijeet:-/python_prog$ |