Introduction to Programming

Introduction to Programming

by BSN Computing

Multiple Select

In this lesson I am going to learn to use ... ?

• Sequence in programs

• Selection in programs

• Repetition (while) in programs

• Iteration (one-dimensional) in programs

Multiple Select

Which two of these programs would generate a run-time error caused by sequencing?

• a = 3

  b = 4

  c = a + b

  b = c * 2

  print(a+b)

• a = 3

  b = 4

  b = c * 2

  c = a + b

  print(a+b)

• a = 3

  b = a + b

  c = a + b

  b = c * 2

  print(a+b)

• a = a + a

  b = a * 2

  c = a + b

  b = c * 2

  print(a+b)

Open Ended

Write a short Python program that swaps the values of three variable, to illustrate the importance of sequence in code. So:

var2 = var1

var3 = var2

var1 = var3

Fill in the Blank

Type the line number where a selection structure starts ...

Fill in the Blank

Type the line number where a selection structure ends ...

Multiple Choice

What is output if:

vegName = "broccoli"

vegNum = 1

vegNumRandom = 2

• Invalid vegetable number

• So you think you can eat 1 broccoli do you?

  Ah ha, the computer can eat 2 broccoli.

• Looks like we both love broccoli

• So you think you can eat 1 broccoli do you?

  You win. The computer can only eat 2 broccoli.

Multiple Choice

What is output if:

vegName = "carrots"

vegNum = 21

vegNumRandom = 20

• Invalid vegetable number

• So you think you can eat 21 carrots do you?

  Ah ha, the computer can eat 20 carrots.

• Looks like we both love carrots.

• So you think you can eat 21 carrots do you?

  You win. The computer can only eat 20 carrots.

Multiple Choice

What is output if:

vegName = ""

vegNum = 0

vegNumRandom = 1

• Invalid vegetable number

• So you think you can eat 0 do you?

  Ah ha, the computer can eat 1.

• You must enter a vegetable name.

• So you think you can eat 0 do you?

  You win. The computer can only eat 1.

Open Ended

Write a selection block in Python that displays a student's Key Stage (1 to 5) depending on the year at school that is input

Multiple Select

Choose two other terms for repetition of a block of code ...

• Looping

• Iteration

• Recursion

• Reflection

Multiple Choice

Which one is a conditional loop in Python?

• while ...

• for ... in range(...)

• for ... in ...

• repeat ... until ...

Multiple Choice

Which one is a count-controlled loop in Python?

• while ...

• for ... in range(...)

• for ... in ...

• repeat ... until ...

Multiple Choice

Which one is an iterative loop over a data structure in Python?

• while ...

• for ... in range(...)

• for ... in ...

• repeat ... until ...

Multiple Choice

Which one is a loop that is not available in Python?

• while ...

• for ... in range(...)

• for ... in ...

• repeat ... until ...

Open Ended

Write a conditional loop in Python that asks the user to enter a number divisible by 2 and keeps asking for a number until a suitable number is input. It then outputs the number.

Open Ended

Write a count-controlled loop in Python that outputs the times table of a number input by the user, from 1 x up to 12 x the number.

Open Ended

Write an iterative loop in Python that counts the number of vowel letters in a string input by the user and outputs that number.

Multiple Select

In this lesson I have learned to use ...

• Sequence in programs

• Selection in programs

• Repetition (while) in programs

• Iteration (one-dimensional) in programs

Open Ended

Thinking Hard

What was the most important thing you've learned in this lesson? Why?

(press Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it