Decomposition part 1

Question 1

Top down approach (2)

What it helps you do+the steps

Answer 1

• reduces the complexity of the problem becaus eyou only have to work on it a portion of a time
• Start by outlining the major parts, then implement the solutions for each part, and debug

Question 2

functions…..____ ______

Answer 2

does something (ex: prints sm on screen)

Question 3

Things needed inorder to use functions: (2)

Answer 3

1. function call
2. function definition

Question 4

Function call

Answer 4

• actually running the function
• ex: print(), input() ***specify the brackets dumbass

Question 5

Function definition

Answer 5

• Instructions that indicate what the finction will do when it runs

Question 6

To call a function that is prefefined

Answer 6

used the brackets “()”

Question 7

Body of a function

Answer 7

• indented
• the instruction or group of instructions that execute when the function is called

Question 8

the “def” in a function

Answer 8

not executable instruction

Question 9

The program start at the first executable instruction that is

Answer 9

not indented
*documentation dont execute

Question 10

How do functions faciliate code reuse?

Answer 10

Once the function definition is complete (and tested reasonably) it can be called (reused many times)

Question 11

Rather than defining instructions outside of a function, the main starting execution point can also be defined explicitly as a function:

Answer 11

• with start functio

Question 12

The starting function (2)

Answer 12

def main ():
def start():

Question 13

local variable

Answer 13

created within the body of a function (indented)

Question 14

global constants

Answer 14

created outside the body of a function

Question 15

Only things that should be gloabl are

Answer 15

constants

Question 16

global constants are

Answer 16

not indented

Question 17

local variables are

Answer 17

idented

Question 18

The only variables that can be outside of a function

Answer 18

are constants

Question 19

Reason 1 for why we should have variables defined locally: (2)

Answer 19

• each variables uses up a portion of memory, if the program is large then many variables may have to be declared (alot of memory may have to be allocated to store the contents of variables)
• having them locally is good as it only stores it when necessary (minimizes memory)

Question 20

So to sum up the special thing abt defining variables locally:

Answer 20

To design a program so that memory for variables is only allocated (reserved in memory) as needed and de-allocated when they are not (the memory is free up) variables should be declared as local to a function

Question 21

The scope of an identifier is where is

Answer 21

may be acessed and used

Question 22

Tell me about locals and ending functions

Answer 22

Bc they are created in the function, once functionends, they are out of scope (no longer accepted)

Question 23

in a function, locals get used but at the end of a function, they get

Answer 23

deallocated or freed up