Lecture 2: Core elements of a program

Question 1

What IDE stands for?

Answer 1

Integrated Development environment

Question 2

What is the IDE of Python?

Answer 2

IDLE

Question 3

What is an IDE?

Answer 3

an integrated development environment includes a specialized text editor that provides highlights, auto-completion, and smart indent. it includes a shell editor.

Question 4

what is the shell?

Answer 4

it is the environment that actually interprets the python code. it includes a syntax highlighter and a debugger.

Question 5

what are the “objects”?

Answer 5

everything in python is an object, including the code. objects have type.

Question 6

what is the “type” of an object?

Answer 6

the type tells us the kind of object it is and what we can do with it.

Question 7

what are the two kinds of types?

Answer 7

scalar & non-scalar

Question 8

what are the scalar types?

Answer 8

they are the atoms of the programming language, they are indivisible. There’s the notion of a literal for every type, which is how we type it. they are divided into:

Integer, floats, booleans, none.

Question 9

What is a float type?

Answer 9

they are the type that corresponds to the real numbers

Question 10

Are floats the same thing as real numbers?

Answer 10

No

Question 11

What is a float?

Answer 11

A float is a computer scientist approx to real numbers but not quite the same. You can pretend a floating point number is real but not always.

Question 12

what is a boolean?

Answer 12

they are statements that are either true or false.

Question 13

What is a none type?

Answer 13

they are used when you want to put in something temporarily.

Question 14

What is scalar type that is not included in python?

Answer 14

Char or characters

Question 15

what python uses instead of Char or characters?

Answer 15

Strings or Str

Question 16

What are the literals?

Answer 16

they are the things we can literally scribe in python, for example putting abc.

Question 17

what is an expression?

Answer 17

it is a sequence of operands and operators

Question 18

what are the operands?

Answer 18

they are objects

Question 19

what is concatenation

Answer 19

it is the combination of two or more strings to form a single string

Question 20

what is an overloaded operator?

Answer 20

they have a meaning that depends on the type of the operands

Question 21

what does the ‘#’ mean in a line in a python script [program]?

Answer 21

that it is a comment and will not execute

Question 22

how do you execute a script or line of script in the shell?

Answer 22

using the print command

Question 23

what is a script [program]?

Answer 23

it is a sequence of commands that tell the interpreter to do something.

Question 24

what is an assignment statement?

Answer 24

it is used to give [binds] a value or a name or an identifier to a variable. it is also used to store value in the variables.

Question 25

what is a variable[in python]?

Answer 25

a name for an object

Question 26

what is the purpose of a comment[in python]?

Answer 26

that the program[script] is easier to read.

Question 27

what is the difference between print and raw input?

Answer 27

print is for the output and raw input is for the input

Question 28

what is a straight-line program?

Answer 28

its a sequence of commands executed one after the other without any deviations once

Question 29

what is a conditional statement?

Answer 29

it is the most primitive kind of program test, conditional statements use the words if and else

Question 30

what is a branching program?

Answer 30

its a program that

Question 30

what is a branching program?

Answer 30

its a program that

Question 30

what is a branching program?

Answer 30

It’s a sequence of commands executed independently and simultaneously in an if-or-else manner. just like straight-line programs each command is executed at least once

Question 31

what is a looping construct?

Answer 31

it is a programming structure that allows a block of code to be repeated multiple times based on certain conditions