Unit 4- Variables Conditionals, and Functions

Question 1

Expression:

Answer 1

-a combination of operators and values that evaluates to a single value

Alternate Definition:

A programming statement
that can consist of a value, a variable, an operator, or a procedure call that returns a value.

Question 2

What do expressions always do?

Answer 2

Evaluate/return to a single value!

Question 3

What symbol is an assignment operator?

Answer 3

=

Question 4

Assignment operator definition

Answer 4

allows a program to change the value represented by a variable

Question 5

Arithmetic operator:

Answer 5

part of most programming languages and include addition, subtraction, multiplication,
division, and modulus operators (Which we haven’t learned yet)

Question 6

Variable:

Answer 6

a named reference to a value that can be used repeatedly throughout a program.

Question 7

Boolean Value:

Answer 7

a data type that is either true or false.

Question 8

Comparison Operators:

Answer 8

<, >, <=, >=, ==, != indicate a Boolean expression

Question 9

Function (Procedure)

Answer 9

a named group of programming instructions.

Question 10

• Function Call

Answer 10

a command that executes the code within a function

Question 11

Boolean Expression:

Answer 11

evaluates to either true or false

Question 12

Concatenation:

Answer 12

joins together two or more strings end-to-end to make a new string.

Question 13

Conditional Statement:

Answer 13

affect the sequential flow of control by executing different statements based on the value
of a Boolean expression.

Question 14

Evaluate:

Answer 14

Expressions are evaluated to produce a single value.

Question 15

Logical operator:

Answer 15

NOT !, AND &&, and OR ||, which evaluate to a Boolean value.

Question 16

Relational operator:

Answer 16

used to test the relationship between two variables, expressions, or values. A comparison
using a relational operator evaluates to a Boolean value. For example: =, ≠, >, <, ≥, and ≤
-THE SAME AS A COMPARISON OPERATOR

Question 17

Selection:

Answer 17

determines which parts of an algorithm are executed based on a condition being true or false

Question 18

String:

Answer 18

an ordered sequence of characters.

Question 19

What does getText/getNumber do?

Answer 19

Usually used in an onevent, gets input data from a specified UI element

Question 20

What does a concatenation operator do?

Answer 20

Combines multiple strings into one

Question 21

What does a \n new line operator do?

Answer 21

creates a new line of text

Question 22

what is an assignment operator

Answer 22

(=) Gets the value of a variable, and changes the value of a variable in a program

Question 23

Comparision operator

Answer 23

evaluates whether an expression setting 2 variales equal to each other is true or false (boolean, ==)

Question 24

What is an if-else statement?

Answer 24

a conditional garunteed exactly 1 of 2 instructions of code will execute

Question 25

What is an if-statement?

Answer 25

A conditional that will execute its code if and only if the expression is true. otherwise, the entire section of code is skipped.

Question 26

What is a nested if statement?

Answer 26

AP pseudo code for if- else-if

Question 27

What does it mean to assign a variable

Answer 27

-giving a variable an initial value using an assignment operator

Question 28

What also means to assign a variable?

Answer 28

-initializing a variable

Question 29

What does it mean to declare a variable

Answer 29

-creating a variable ALWAYS using var, which is only used for declaring variables

Question 30

What also means to declare a variable?

Answer 30

defining a variable

Question 31

What does calling a variable mean?

Answer 31

-referencing/using a variable in a program statement

Question 32

What is variable reassignment

Answer 32

Giving a variable a new value after it's been assigned one.

Question 33

What happens if a variable is defined/declared in a function

Answer 33

It is local, so it does not leave the function. Therefore, it cannot be used in code, and the function will cause an error, or it will be skipped altogether.