Lecture 6

Question 1

Loops definition

Answer 1

Loops are used to repeat certain sections of code a defined number of times

Question 2

What do loops allow us to do?

Answer 2

-automate repetitive tasks without having to rewrite code
-Add flexibility/adaptability to code when the number of times a code should be repeated is dynamic
-embedded automation systems operate as loops

Question 3

What do for loops do

Answer 3

The for loop in Python is the concept of an editable which are data structures that contain multiple elements which can be retrieved one at a time.

Question 4

What type of data structures are iterable?

Answer 4

Lists
Tuples
Sets
Dictionaries

Question 5

For loop syntax

Answer 5

For <var> in <iterable>:
<code>
<code></code></code></iterable></var>

Question 6

Given my_dict={“a”:1, “b”:2}
For x in my_dict:
print(x, “:”, my_dict[x])

Answer 6

Output =
a:1
b:2

Question 7

Given my_dict={“a”:1, “b”:2}
For x in my_dict.values():
print(x)

Answer 7

Output:
1
2

Question 8

Given my_dict={“a”:1, “b”:2}
For x, y in my_dict.items():
print(x, “:”, y)

Answer 8

Output:
a:1
b:2

Question 9

How to break loops

Answer 9

Add the break command.
The loop will stop when this line is encountered, even if there are more things to iterate

Question 10

Skipping the remainder of the current iteration, but continuing on with the next iteration command

Answer 10

Continue

Question 11

Range command

Answer 11

range(start, stop, step)
Will return an editable that is a sequence of numbers from start to stop incremented by step .

Question 12

Start, stop and step for range command

Answer 12

Start is optional and when excluded is default zero
Step is optional and when excluded is default one it may also be negative
An empty sequence is returned if start is greater than stop

Question 13

Nested loop

Answer 13

Is a loop inside of a loop

Question 14

While loops

Answer 14

While loops execute a section of coda as long as a condition is true. While loops, unlike four loops are almost the same as other other programming languages.

Question 15

While loop syntax

Answer 15

while <condition>:
<code>
<code></code></code></condition>