Exercise 2.1

Do the following exercises.

• Define a variable to represent the average temperature in June and have it refer to a value of 82.3. Draw a picture of the resulting name and object space.
• Mark each of the following Python literals with their type.
  • 4.0
  • 4
  • 'Four'
• Which of the following identifiers are valid and which follow the conventional naming scheme for variables?
  • sCoRe
  • remaining_classes
  • UNIT
  • 1stName

Exercise 2.2

Which of these are legal assignment statements?

• 33 = a
• f(x) = x*3 + 7
• a = 33
• a == 33
• astr = hello, world!
• a = a + 1
• a = -a

Exercise 2.3

Write a program that prompts for and receives from the user a diameter in inches and prints the circumference and area in square centimeters. First, design an algorithm, then write the code.

Exercise 2.4

Write a program that prompts for and receives from the user a number of days and print the equivalent number of weeks and days. First, design an algorithm, then write the code.