Java - Variables and Expressions Practice

Which of the following is a valid Java variable name?

• 10thousand

• _squareValue

• $earned

• amount_remaining

You need three things to declare a variable in Java.

The datatype, ; at the end, and...

• the variable name

• an equal sign

• //at the beginning

• the variable size

Which of the following lines of code correctly declares a variable with a proper Java variable name?

• boolean isOff;

• Int size;

• double $saved;

• string FirstName;

Which of the following lines of code correctly declares AND initializes a variable with an appropriate value?

• boolean isOff = yes;

• int size = 500.8;

• double saved$ = 400.0;

• String firstName = Tuna;

When dividing two ints in Java, the answer will be an int.

For example: 10/3 = 3

• TRUE

• FALSE

Evaluate the expression below.

2 + 6 * 4 - 5

• 21

• 27

• -4

• -8

Evaluate the expression below.

(4 + 3) * 2 - (19 / 5)

• 11

• 10.2

• -7

• 25

Evaluate the expression below.

42.0/8 - 17 % (5 + 3)

• 4.25

• 4

• -4

• 5.25

Match the following Java operators to their symbols.

• +

• Increment

• /

• Multiplication

• ++

• Modulo

• %

• Division

• *

• Addition

The answer to a division problem with a double and an int is a _______