Variables

Question 1

What is the rules when declaring a variable?

Answer 1

****How to declare and use a variable****

• Variables must begin with a Alphabetical character
• Can only use numbers, alphabetical characters + _
• CANNOT BE A NAME THAT IS RESERVED WORD

Question 2

What is the general structure of a java program?

Answer 2

Question 3

What is the definition for variables

Answer 3

A symbol that holds a value that can be changed and maipulated

Question 4

What is the int data type and how do you declare it?

Answer 4

int aInteger = 2121212121;

Question 5

What is the double data type and how do you declare it?

Answer 5

double aDouble = 3.142;

Question 6

What is the boolean data type?

Answer 6

boolean aBooleanValue = true;

Question 7

What is the char data type?

Answer 7

char copyright = ‘\u00A9’;

Question 8

What is the string data type

Answer 8

String aString = “Baby says that Joey is STOOPID “

Question 9

How do you add two variables?

Answer 9

x += y;
x = x + y;

Question 10

How do you subtract two variables

Answer 10

x -= y;
x = x - y;

Question 11

How do you multiply two variables

Answer 11

x *= y;
x = x * y;

Question 12

How do you divide two variables

Answer 12

x /= y;
x = x / y;

Question 13

How do you mod two variables

Answer 13

x %= y;
x = x % y;

Question 14

How do you perform a logical AND gate on two variables?

Answer 14

x &= y;
x = x & y;

Question 15

How do you perform a logical OR gate on two variables

Answer 15

x |= y;
x = x| y;

Question 16

What is constant?

Answer 16

final = declaring a constant

double = data type

pi = name of variable

```java
final double pi = 3.142
~~~