Exam 3: Control Structures

Examine the following lines of code: Current = 1 Sum = 0 N = 5 While current <= n: Sum = sum + current Current = current + 1 What is the value of sum after the loop completes all of its iterations?

Give a logically equivalent expression for each of the following: -num1 > 0 and num2 > 0

Python built-in functions _____ and _____ can be used to convert a string type to a numeric type.

Match the expressions that they are logically equivalent to the Boolean expressions : -not (x != y)

Which form of control does the while statement in Python provide?

Match the expressions that they are logically equivalent to the Boolean expressions : -not (x >= y)

Give a logically equivalent expression for each of the following: -num1 <= 0 or num2 <= 0

Which of the following can the condition of a while statement be based on?

What is the term for a statement that determines the control flow of a set of instructions?

Give a logically equivalent expression for each of the following: -not (num1 == 0 and num2 == 0)

All if statements must include the use of a _____________ expression.

Evaluate the following Python expressions. -10 not in (10, 20, 30)

Examine the following statements. X = 10 X == 10 What will the second line evaluate to?

Operator precedence applies to the arithmetic operators and relational operators, but not to the Boolean operators.

if Statements may contain as many else headers as necessary.

Write a simple Python program by use of a single if statement with elif headers that prompts the user to enter the name of a month ('January', 'February', etc.) and sets each of the variables fall_season, winter_season, spring_season, summer_season to the appropriate Boolean value. For example, if the user enters 'January', variable winter_season should be set to True, and the rest of the variables set to False. (Consider the months January, February and March as winter; April, May and June as spring; etc.

The == operator is used for the assignment of Boolean values.

The if statement in Python provides a means of __________ control.

The order that instructions are executed in a program is called _____________________.

Evaluate the following Python expressions. -5 < 10 and 8 > 20 or 4 < 2