Python Programming Grammar

Question 1

List

Answer 1

A collection of data of one or more types within square brackets

[“hello”, 0, 1.5, 3]

Question 2

Quotient

Answer 2

A quotient is the number obtained by dividing one number by another. It can be an int or float.

For example, if you divide 6 by 3, you get 2, which is the quotient.

It is the answer from the division process.

Question 3

Remainder (modulus) %

Answer 3

After you divide two numbers and get the quotient. The number left over is called the remainder.

Modulus (or “mod”, for short) returns the remainder of dividing one number by another number. e.g. 15 % 10 will return 5.

Question 4

Difference between quotient and the remainder (modulus)

Answer 4

The number of times we have subtracted is called the quotient (of the division of by ) The number that is leftover from after subtracting as often as possible is called the remainder (of the division of by ).

In integer division and modulus, the dividend is divided by the divisor into an integer quotient and a remainder. The integer quotient operation is referred to as integer division, and the integer remainder operation is the modulus.

Question 5

Dividend

Answer 5

The number that you are dividing

Question 6

Division in Python

Answer 6

The dividend, divisor, quotient and remainder.

In Division, the number which we divide is called the dividend. The number by which we divide is called the divisor. The result obtained is called the quotient. The number left over is called the remainder.

Question 7

Divisor

Answer 7

The number by which we divide is called the divisor.

Question 8

Float

Answer 8

Real value (decimal)
Also known as floating-point number

Question 9

Integer / Int

Answer 9

A number with no decimal

A whole number

Question 10

String / Str

Answer 10

A collection of characters within single or double quotes

“hello”, ‘hello’

Question 11

Truncate / /

Answer 11

Shorten the duration or extent of

Look for other definitions. This one seems lacking.

Question 12

Syntax

Answer 12

the arrangement of words and phrases to create well-formed sentences in a language.

a set of rules for or an analysis of the syntax of a language.
plural noun: syntaxes
“generative syntax”

the branch of linguistics that deals with syntax.

Question 13

Packages

Answer 13

Researchers, mathematicians, and data scientists in particular like Python because of its rich and easy to understand syntax and the wide range of open-source packages available. Packages are commonly used, shared code libraries that are freely available for anyone to use.

Question 14

Learning the pythonic way

Answer 14

Python is supported by an active user community that is eager to help new programmers learn the Pythonic way, where you don’t just get the syntax right, but use the language the way it was intended.

Question 15

Python is an interpreted language which reduces the ____________
Because there’s no _______________.

Answer 15

1. edit-test-debug cycle

2. no compilation step required.

Question 16

In order to run Python apps, you need a ______________

Answer 16

runtime environment/interpreter to execute the code.

Question 17

Most of the runtime environments/ interpreters support two ways to execute Python code:

Answer 17

Interactive mode and Script mode

Question 18

Interactive mode

Answer 18

in this mode, each command you type is interpreted and executed immediately, and you see the results each time you press ENTER. The interactive mode is the default mode if you don’t pass a filename to the interpreter.

Question 19

Script mode

Answer 19

in script mode, you put a set of Python statements into a text file with a .py extension. You then run the python interpreter and point it at the file. The program is executed line by line, and the output is displayed. There is no compilation step, as shown in the following diagram:

.py 👉 Python interpreter 👉 results

Question 20

“Read-Eval-Print-Loop”, or REPL.

Answer 20

Python supports an interactive console experience, which allows you to type in commands and see the results immediately. This experience is sometimes referred to as a “Read-Eval-Print-Loop”, or REPL.

Question 21

How to use REPL

Answer 21

To use the REPL, type python in your console. You will get is a prompt similar to the below output, which then waits for you to input commands:

Output
—————
Python 3.9.5 (default, May 27 2021, 19:45:35)
[GCC 9.3.0] on linux
Type “help”, “copyright”, “credits” or “license” for more information.
»>

Question 22

What can REPL do?

Answer 22

Run and evaluate statements. You can have the REPL evaluate a statement like so:

Output
————
>>> 1+1
2
>>>

Or

Declare variables and functions. You can also create variables and functions, and REPL will remember that they exist, should you try to use them later:
Output

> > > PI = 3.14
PI
3.14

Or Use the built-in help. Getting help on a topic can be useful, as you don’t have to leave the editor of your choice, to browsing on the Web, but you can continue to author code.

Question 23

Using help: The REPL has a built-in help function you can use to look up keywords and functions.

Answer 23

The REPL has a built-in help function you can use to look up keywords and functions. The generalized syntax for this function is:
Python

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help([object])
Where [object] is a specific function or keyword you want help on.

Question 24

Variables

Answer 24

Variables are one of the fundamental building blocks of programs written in Python. Variables hold data in memory. They have names, and they can be referenced by those names. Variables also havetypes, which specify what type of data they can store (such as string and integer), and they can be used in expressions that useoperators(such as+and-) to manipulate their values.

In Python, a variable is declared and assigned a value using the assignment operator =. The variable is on the left-hand side of the operator, and the value being assigned — which can be an expression such as 2 + 2 and can even include other variables — is on the right-hand side:
Python

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x = 1 # assign variable x the value 1
y = x + 5 # assign variable y the value of x plus 5
z = y # assign variable z the value of y
These examples assign numbers to variables, but numbers are just one of several data types Python supports. Notice there’s no type declared for the variables. This is because Python is a dynamically typed language, meaning the variable type is determined by the data assigned to it. In the examples above, the x, y, and z variables are integer types, capable of storing positive and negative whole numbers.
Variable names are case sensitive and can use any letter, number, and the underscore (_) character. However, they can’t start with a number.

Question 25

In Python, a variable is declared and assigned a value using the assignment operator _______.

Answer 25

=

The variable is on the left-hand side of the operator, and the value being assigned — which can be an expression such as 2 + 2 and can even include other variables — is on the right-hand side:
Python

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x = 1 # assign variable x the value 1
y = x + 5 # assign variable y the value of x plus 5
z = y # assign variable z the value of y

These examples assign numbers to variables, but numbers are just one of several data types Python supports. Notice there’s no type declared for the variables. This is because Python is a dynamically typed language, meaning the variable type is determined by the data assigned to it. In the examples above, the x, y, and z variables are integer types, capable of storing positive and negative whole numbers.
Variable names are case sensitive and can use any letter, number, and the underscore (_) character. However, they can’t start with a number.

Question 26

Types for integers and decimals

Answer 26

Python creates integers from a built-in data type called int, and decimals (floating-point numbers) as instances of float. Python’s built-in type() function returns a variable’s data type. The following code outputs data types:
Python

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x = 1
print(type(x)) # outputs:

x = 1.0
print(type(x)) # outputs:
The addition of the “.0” to the end of “1” makes a large difference in how the programming language treats a value. The data type impacts how the value is stored in memory, how the processor (CPU) handles the data when evaluating expressions, how the data relates to other data, and what kinds operations you can perform with it.

Question 27

Determining types of objects

Answer 27

Int, float, string

To determine the type of an object, we use the functiontype. We can call the functiontypeon aliteralvalue such as the integer3or string”hello”, or a variable that holds a value such asxorword.

E.g
type(1)
The above would run as int

X = 1
The above would run as int

Type(‘hello’)
The above would run as str

word = “hello”
type(word)
The above would run as str

Question 28

Almost all data in Python is stored as ______.

Answer 28

Objects

Question 29

True or false:

Comments in code must have a space in between the # and the comment

Answer 29

this is an example of wrong usage of a comment. The computer will not recognize it.

True. There must always be a space between the comment # and the comment. E.g
# this is a line of code 

Question 30

True or false:

Comments cannot be on the same line as code

Answer 30

False.
Comments can be put right after code. They do not have to be on a separate line.

E.g
X = 1 # this comment can go here