Selection

Question 1

What is selection?

Answer 1

Making choices in the flow of execution of a program made on the basis of expressions that must evaluate to true or false(Boolean)

Question 2

Example:

If :

else:

Answer 2

Just an example ;)

Question 3

What are the Boolean operators?

Answer 3

And or Not

Question 4

Operator precedence

Answer 4

() = highest
**
* / // %
< <= >= > == !=
Not
And
Or = lowest

Question 5

De Morgan’s laws

Answer 5

Not (A or B) = Not A and Not B
Not (A and B) = Not A or Bot B

Question 6

What is a+= 3?

Answer 6

A = a + 3

Question 7

What does the eval function do?

Answer 7

Convert string into number

I.e eval(input(…..))

Question 8

How to: — Truncate the floating point number
— Round a number up
— Round a number down
— Round to the closest integer or floating point?
— Square Root

Answer 8

• int(x)
• math.ciel(x)
• math.floor(x)
• round(x, decimal places)
• math.sqrt(x)