Wek 4

Question 1

What is a constant?

Answer 1

Fixed values such as number, letters are called constants because these numbers do not change

Question 2

What do string constant use?

Answer 2

quotes (‘) or double quotes (“)

Question 3

What is a variable?

Answer 3

is a named place in the memory where a programmer can store data and later receive the data suing the variable “name”

Question 4

Do programmers get to use choose the names of variables?

Answer 4

Yes, they do.

Question 5

What are good names for variables?

Answer 5

spam, eggs, spam23, _speed

Question 6

What are bad names for variables?

Answer 6

23spam, #sign, var.12

Question 7

Are these distinct variables: spam, Spam, SPAM ?

Answer 7

Yes.

Question 8

Can you use reserved words as valuables?

Answer 8

No, you cannot.

Question 9

What is this: x = 2

Answer 9

An assignment statement

Question 10

How do you call this:

Answer 10

x = x + 2 (Assignment with expression)

Question 11

Of what does an assignment statement consist?

Answer 11

Question 12

Can x change its value?

Answer 12

Yes, absolutely

Question 13

What is the operator for addition?

Answer 13

x

Question 14

What is the Oprator for subtraction?

Answer 14

-

Question 15

What is the Operator for multiplication ?

Answer 15

*

Question 16

What is the Operator for division?

Answer 16

/

Question 17

What is the operator for power?

Answer 17

**

Question 18

What is the operator for remainder?

Answer 18

%

Question 20

What are the operator precedence rules?

Answer 20

1. Parenthesis
2. Exponentiation
3. Multiplication
4. Addition
5. Left to right

Question 21

How is integer division in Python?

Answer 21

quite weird

Question 22

99/100

What will come out in Python?

Answer 22

0

Question 23

99/100.0

What will come out in Python?

Answer 23

0.99

Question 24

What happens if you perform an operation and one number is an integert and the other a floating point?

Answer 24

the result is a floating point

Question 25

What does concatenate mean?

Answer 25

put together

Question 26

How can you find out the type of sth?

Answer 26

Question 27

When you put an integer and a floating point into an expression the result will be…

Answer 27

a floating point

Question 28

print float (99)/100

Answer 28

0.99

Question 29

Can you concatenate a string and an integer?

Answer 29

No, that is not possible

Question 30

How do you find out the type of “sval” ?

Answer 30

print type(sval)

Question 32

What do you use the raw input function for?

Answer 32

Question 33

In Python, anything after a # is…

Answer 33

ignored

Question 34

HOw can you multiply Hi fiv e times?

Answer 34

print “Hi” * 5

Question 35

On what should you base your decision about variables?

Answer 35

On what we want to remember