Variables Review

Which of the following will properly declare an String named 'school' that has a value of "Millard North".

• String school = "Millard North";

• string school = "Millard North";

• String school = 'Millard North';

• String school = "Millard North"

Answer explanation

Did you notice the missing ;

Declare an integer named 'x' that has a value of '15'

(a)  

Declare an boolean named 'x' that has a value of 'false'

(a)  

Declare an double named 'x' that has a value of '15'

(a)  

Answer explanation

Remember doubles hold floating point numbers so 15 would be stored as 15.0

Declare an char named 'x' that has a value of '5'

(a)  

Answer explanation

Remember char uses single quotes ' '

not double quotes " "

Declare an String named 'x' that has a value of '5'

(a)  

Answer explanation

Remember char uses single quotes ' '

String uses double quotes " "

What are the values in a, b, and c after executing each of the following statemets?

f

g

h

e

c

a = 61

b = 61

a = 11

b = 23

b = 11

c = 11

c = 61

c = 23

a = 23

Answer explanation

Remember Java run in order top to bottom, so once something has changed that is the new value.

What is the value of "a" after executing the following statements?

(you will show your work step by step)

h

f

c

b = 3

b = -2

a = 3

b = 5

temp = 5

a = 0

a = 5

a = -2

b = 0

temp = 7

What is the value of "a" and "b" after executing the following statements?

(show your work step by step)

e

h

d

a = 11

b = 7

b = 16

a = 5

a = 9

b = 12

a = 25

a = 12

What is the value of "a" after executing the following statement?

(show the work step by step)

j

f

e

b

b = 7

b = 12

b = 9.3

b = 0

a = 19.3

a = 20

b = 10

a = 5

a = 10

b = .7