Unit 4 Vocab

Question 1

Expression

Answer 1

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

Question 2

Assignment Operator

Answer 2

Allows a program to change the value represented by a variable

Question 3

Variable

Answer 3

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

Question 4

Concatenate

Answer 4

to link together or join. Typically used when joining together text Strings in programming (e.g. “Hello, “+name)

Question 5

String

Answer 5

Any sequence of characters between quotation marks (ex: “hello”, “42”, “this is a string!”).

Question 6

Boolean Value

Answer 6

A data type that is either true or false

Question 7

Boolean Expression

Answer 7

in programming, an expression that evaluates to True or False.

Question 8

Comparison (Relational) Operators

Answer 8

Used to compare two values.
= = equal to
! = not equal to
> greater than
< less than
> = greater than or equal to
< = less than or equal to

Question 9

Logical Operators

Answer 9

Allow you to compare the results of more than one Boolean operation at a time.
&& and
to evaluate true – both must be true
| | or
to evaluate true – one or both must be true
! not
To evaluate true – not false

Question 10

Abstractions

Answer 10

a simplified representation of something more complex. Abstractions allow you to hide details to help you manage complexity, focus on relevant concepts, and reason about problems at a higher level.

Used in functions

Question 11

Function

Answer 11

A named group of programming instructions. Functions are reusable abstractions that reduce the complexity of writing and maintaining programs

Question 12

Procedure

Answer 12

A named group of programming instructions that may have parameters and return values

Question 13

Function Call (to invoke a function)

Answer 13

A command that executes the code within a function

Question 14

High Level Programming Language

Answer 14

A programming language with many commands and features designed to make common tasks easier to program. Any high level functionality is encapsulated as a human can read it

Question 15

Low Level Programming Language

Answer 15

A programming language that captures only the most primitive operations available to a machine. Anything that a computer can do can be represented with combinations of low level commands

Question 16

If-Statement

Answer 16

The common programming structure that implements “conditional statements”.

Question 17

Selection

Answer 17

A generic term for a type of programming statement (usually an if-statement) that uses a Boolean condition to determine, or select, whether or not to run a certain block of statements.

Question 18

Stringed together….

Answer 18

An ordered sequence of characters