Python Basics: Hello World and Selection

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Questions and Answers

What will the program print if the user inputs 'BFG'?

BFG is not too bad

BFG is my favourite too! (correct)

BFG is a terrible choice

BFG is the best film ever!

What will happen if the user guesses the number 13 correctly?

The program will print 'Sorry, it’s not 13'

The program will print 'Amazing, you guessed it' (correct)

The program will terminate immediately

The program will print the lucky number as 16

Which of the following best describes the purpose of the variable 'lucky'?

It keeps track of the number of guesses.

It stores the user's guess.

It is a placeholder for the best film.

It defines the lucky number to be guessed. (correct)

If a user inputs a number other than 13, what feedback can they expect?

Sorry, it’s not [inputted number] Signup and view all the answers

What will the final output of the program be after any guess?

Nice playing with you Signup and view all the answers

How does the program check the user's guess against the lucky number?

It compares the guess directly in the if statement. Signup and view all the answers

What type of input does the program expect from the user for guessing the number?

An integer number Signup and view all the answers

What message does the program display if a user types in their guess as 7?

Sorry, it’s not 7 Signup and view all the answers

What will be printed if the random integer generated is 0?

heads Signup and view all the answers

What will be printed if the random integer generated is 1?

tails Signup and view all the answers

What feature allows the program to select between heads or tails?

Selection statement Signup and view all the answers

If the generated integer was 0, which line of code directly leads to printing the result?

print(result) Signup and view all the answers

What happens if the coin variable is not generated randomly?

The program may not behave as expected Signup and view all the answers

Which of the following statements is true about the flow of the program?

It’s impossible to predict the output before execution. Signup and view all the answers

What concept does the program illustrate with respect to decision-making?

Conditional branching Signup and view all the answers

What type of structure is primarily demonstrated in the provided code?

Conditionals Signup and view all the answers

What will be the output of the program after executing the code: count = 3; print(count); count = count - 1; print(count)?

3 and then 2 Signup and view all the answers

What does the instruction 'count = count - 1' do in the program?

It evaluates count minus 1 and assigns the result back to count. Signup and view all the answers

If the variable 'name' is not modified in the program, what is likely to occur during the execution of a while loop that depends on 'name' for its condition?

An error will occur when checking the condition. Signup and view all the answers

What is the effect of using a while statement in programming?

It allows for the execution of code blocks multiple times as long as the condition is true. Signup and view all the answers

Which of the following denotes that an error will occur when executing a condition involving the variable 'name'?

When 'name' has not been assigned any value. Signup and view all the answers

How does using Boolean variables help in programming with conditions?

They enable simple true/false condition checks. Signup and view all the answers

What can be inferred about the function of a counter variable in a loop?

It must be changed within the loop to avoid infinite execution. Signup and view all the answers

What determines the termination of a while loop?

The modification of the variables involved in the condition. Signup and view all the answers

What will the output of the program be when executed with count starting at 3?

3 2 1 0 Signup and view all the answers

How many times will the print statement inside the while loop execute if count starts at 3?

What is the initial value of count in the given program before the while loop begins?

3 Signup and view all the answers

What will the count variable be after the loop finishes executing if it started at 3?

0 Signup and view all the answers

Which statement correctly describes the flow of execution in the presented program?

The count variable is printed each time before it is decremented. Signup and view all the answers

What purpose does the assignment statement serve in Python?

It stores a value in a variable for later use. Signup and view all the answers

What does the print function require when displaying a message?

Both opening and closing round brackets around the message. Signup and view all the answers

Which of the following statements is accurate about variable naming in Python?

Variable names can include letters, numbers, and underscores. Signup and view all the answers

In the statement 'user = "Claude"', what type of value is assigned to the variable 'user'?

String Signup and view all the answers

What will the output of the command print('Hello', user) be if user is assigned the value 'Claude'?

Hello Claude Signup and view all the answers

What is the significance of quotes around values in Python?

They show the value is a string, a piece of text. Signup and view all the answers

Which statement is true regarding Python's print function?

The print function can display multiple values separated by commas. Signup and view all the answers

What does the checklist suggest is important when using the print function?

Using case-sensitive spelling for 'print'. Signup and view all the answers

Study Notes

Your First Steps in Python

The traditional first program to write in any new programming language is a "Hello World" program
Python is Case-Sensitive, using capital letters when writing code matters
The print() function is used to display text, numbers, and variables or expressions in a program
user = "Claude" this is an example of an assignment statement, which assigns a value to an identifier named user
user is a variable, a name for a value. The variable user refers to the value "Claude"
The quotation marks around the value indicate that it's a string (a piece of text)
lucky = 13 lucky is another variable assigned an integer value

Practising Selection

If statements check a condition and select one out of two branches to follow.
The example code demonstrates how to use if statements to check if a user's guessed film is "BFG" and provide feedback
It also demonstrates how to check a user's guess against a number to see if they guessed correctly

Lucky Number

The program prompts the user to guess a number
If the user guesses correctly, the program prints "Amazing, you guessed it"
If the user's guess is incorrect, the program provides feedback by printing "Sorry, it’s not " followed by the guess, and then prints "My lucky number is " followed by the correct number.
The program then ends with a message saying "Nice playing with you"

Selection

The if statement allows for more than two cases in a problem
The while statement provides a way to execute a block of code repeatedly as long as a condition is true
name is a variable that is not modified in the example code, so the program will either error or never terminate

Making Predictions

Assignments in Python are not mathematical equations
They are instructions to evaluate an expression and assign the resulting value to a variable

Count

The program demonstrates how to use a while loop with a variable as a counter to print out a series of values.
In the loop, the program repeatedly subtracts 1 from the count variable until it reaches 0
The body of the loop prints the current value of the count variable at each iteration.

Round and Round

A while statement is used to allow the flow of program execution to include loops
Variables can be used as counters, keeping track of a number of iterations

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Description

This quiz covers the fundamental concepts of Python programming, including the classic 'Hello World' program and the use of variables, string assignments, and if statements. Test your knowledge on how to display text and make decisions in Python. Perfect for beginners taking their first steps in coding.