Computer Programming Exercise 4: What is the purpose of the “def” keyword in Pyt

Question

Computer Programming

Exercise 4: What is the purpose of the “def” keyword in Python?

a) It is slang that means “the following code is really cool”

b) It indicates the start of a function

c) It indicates that the following indented section of code is to be stored for later

d) b and c are both true

e) None of the above

Exercise 5: What will the following Python program print out?

def fred():

     print("Zap")

def jane():

    print("ABC")

jane()

fred()

jane()

a) Zap ABC jane fred jane

b) Zap ABC Zap

c) ABC Zap jane

d) ABC Zap ABC

e) Zap Zap Zap

Exercise 6: Rewrite your pay computation with time-and-a-half for overtime and

create a function called computepay which takes two parameters (hours and rate).

Enter Hours: 45

Enter Rate: 10

Pay: 475.0

Exercise 7: Rewrite the grade program from the previous chapter using a function

called computegrade that takes a score as its parameter and returns a grade as a

string.

Score Grade

> 0.9 A

> 0.8 B

> 0.7 C

> 0.6 D

<= 0.6 F

Program Execution:

Enter score: 0.95

A

Enter score: perfect

Bad score

Enter score: 10.0

Bad score

Enter score: 0.75

C

Enter score: 0.5

F

Run the program repeatedly to test the various different values for input.

Explanation / Answer

1)Answer: b)It indicates the start of a function

Explanation:

def keyword  indicates the start of a function.

5)Answer: d) ABC Zap ABC

Explanation:

Here

jane(): = print("ABC") and

fred(): = print("Zap")

we want to print

jane()

fred()

jane()

so it will print d) ABC Zap ABC.

6)Answer:

print "Pay: %.2f" % computepay(hours, rate)

7)Answer:

import sys hours = raw_input("Enter Hours: ") rate = raw_input("Enter Rate: ") OVERTIME_RATE = 1.5 try: hours = float(hours) rate = float(rate) except: print "Please enter valid input" sys.exit(1) def computepay(hours, rate): if hours > 40: overtime_hours = hours - 40 # hours over 40 hours -= overtime_hours # regular rate hours overtime_pay = overtime_hours * rate * OVERTIME_RATE return (hours * rate) + overtime_pay else: return (hours * rate)

print "Pay: %.2f" % computepay(hours, rate)

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