Part 2, Introduction to problem solving in python

Question 1

what is one way of expressing in an algorithm that we need to do something for a number of times

Answer 1

Question 2

when designing an algorithm what signs can be used to represent the problem(1) and any subproblems(2)

Answer 2

1. >
2. >>

Question 3

1. this is used to hold many values within a single variable
2. each item within this is known as an element and each element can be accessed via its index number, that is its position inside the —- starting from 0

Answer 3

what is a list, and what terms are used to desribe its parts

Question 4

in python this is used to return a sequence of numbers

Answer 4

what is the python range() function used for

Question 5

these can be translated into code by creating them as comments within the code

Answer 5

the symbols > and >> can be used to represent the problem and any subproblems of an algorithm, how do these later translate into code

Question 6

range(start, stop, step)

1. start - the number you would like to start from (included in sequence)
2. stop - the number you would like to stop at (excluded from sequence)
3. step - the increment of the sequence (default 1)

Answer 6

describe the python range() parameters

Question 7

what is a list, and what terms are used to desribe its parts

Answer 7

1. this is used to hold many values within a single variable
2. each item within this is known as an element and each element can be accessed via its index number, that is its position inside the —- starting from 0

Question 8

will print ‘hello world’ and then a space (does not start a new line)

Answer 8

describe what the following python code does

Print(‘hello world’, end = ‘ ’)

Question 9

this is of the form “variable = expression”. The expressions value is found first and then stored inside the variable.

Answer 9

what is an assignment

Question 10

what are the 7 steps of the problem solving process

Answer 10

1. problem
2. decompose
3. sub problems
4. decompose
5. algorithm
6. implement
7. code

Question 11

A statement where some code only gets executed under certain circumstances, determined by a boolean condition

Answer 11

what is a conditional statement

Question 12

Answer 12

what is one way of expressing in an algorithm that we need to do something for a number of times

Question 13

describe what the following python code does

Print(‘hello world’)

Answer 13

will print ‘hello world and start a new line

Question 14

describe what the following python code does

Print(‘hello world’, end = ‘ ’)

Answer 14

will print ‘hello world’ and then a space (does not start a new line)

Question 15

describe the python for loop syntax

Answer 15

for x in (list, a tuple, a dictionary, a set, or a string)

Question 16

for x in (list, a tuple, a dictionary, a set, or a string)

Answer 16

describe the python for loop syntax

Question 17

will print ‘hello world and start a new line

Answer 17

describe what the following python code does

Print(‘hello world’)

Question 18

1. >
2. >>

Answer 18

when designing an algorithm what signs can be used to represent the problem(1) and any subproblems(2)

Question 19

A way of structuring code that a programming language recognises as having a particular meaning

Answer 19

what is a programming construct

Question 20

1. problem
2. decompose
3. sub problems
4. decompose
5. algorithm
6. implement
7. code

Answer 20

what are the 7 steps of the problem solving process

Question 21

describe the python range() parameters

Answer 21

range(start, stop, step)

1. start - the number you would like to start from (included in sequence)
2. stop - the number you would like to stop at (excluded from sequence)
3. step - the increment of the sequence (default 1)

Question 22

what is a programming construct

Answer 22

A way of structuring code that a programming language recognises as having a particular meaning

Question 23

the symbols > and >> can be used to represent the problem and any subproblems of an algorithm, how do these later translate into code

Answer 23

these can be translated into code by creating them as comments within the code

Question 24

what is a conditional statement

Answer 24

A statement where some code only gets executed under certain circumstances, determined by a boolean condition

Question 25

what is an assignment

Answer 25

this is of the form “variable = expression”. The expressions value is found first and then stored inside the variable.

Question 26

will print a new line

Answer 26

describe what the following python code does

print()

Question 27

what is selection

Answer 27

Where some code is only carried out under certain circumstances

Question 28

Where some code is only carried out under certain circumstances

Answer 28

what is selection

Question 29

describe what the following python code does

print()

Answer 29

will print a new line

Question 30

what is the python range() function used for

Answer 30

in python this is used to return a sequence of numbers