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JavaScript Chapter 2 - Working with Functions, Data Types, and Operators

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local variable

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Date created

Mar 1, 2020

Cards (44)

Section 1

(44 cards)

local variable

Front

a variable that is declared inside a function and is available only within the function in which it is declared, because it has local scope.

Back

return statement

Front

a statement in a function that returns a value to the statement that called the function

Back

adding an event listener

Front

specifying an event handler with the addEventListener() method.

Back

primitive types

Front

data types that can be assigned only a single value

Back

comparison operator

Front

an operator used to compare two operands and determine if one value is greater that another

Back

escape character

Front

the backslash character ( \ ) with one of several characters, which inserts a special character into a string

Back

binary operator

Front

an operator that requires an operand before and after it.

Back

function statements

Front

the statements that do the actual work of a function, such as calculating the square root of a parameter, or displaying a message of the screen, and which must be contained within the function braces.

Back

data type

Front

the specific category of information that a variable contains, such as numeric, Boolean, or string.

Back

logical operators

Front

The Or (||), And (&&), and Not (!) operators, which are used to modify Boolean values or specify the relationship between operands in an expression that results in a Boolean value

Back

assignment operator

Front

an operator used for assigning a value to a variable

Back

prefix operator

Front

an operator that is placed before a variable name

Back

arguments

Front

the variables or values that you place in the parentheses of a function call statement

Back

named function

Front

a set of related statements that is assigned a name

Back

unary operator

Front

an operator that requires just a single operand either before or after it.

Back

concatenation operator

Front

the plus sign (+) when used with strings; this operator combines, or concatenates, string operands.

Back

browser console

Front

a browser pane that displays error messages

Back

floating-point number

Front

a number that contains decimal places or that is written in exponential notation

Back

conditional operator

Front

the ?: operator, which executes one of two expressions based on the results of a conditional expression.

Back

postfix operator

Front

an operator that is placed after a variable name

Back

falsy values

Front

six values that are treated in comparison operations as the Boolean value false.

Back

call

Front

to invoke a function from elsewhere in your code

Back

function

Front

a related group of JavaScript statements that are executed as a single unit

Back

anonymous function

Front

a set of related statements with no name assigned to it

Back

innerHTML property

Front

the property of a web page object whose value is the content between the element's opening and closing tags.

Back

operator precedence

Front

the system that determines the order in which operations in an expression are evaluated

Back

variable scope

Front

the aspect of a declared variable that determines where in code it can be used, either globally (throughout the code) or locally (only within the function in which it is declared).

Back

textContent property

Front

a property similar to the innerHTML property, except that its value excludes any HTML markup.

Back

integer

Front

a positive or negative number with no decimal places

Back

global variable

Front

a variable that is declared outside a function and is available to all parts of your program, because it has global scope.

Back

strongly typed

Front

description of a programming language that requires you to declare the data types of variables

Back

function definition

Front

the lines that make up a function

Back

boolean value

Front

a logical value of true or false

Back

loosely typed

Front

description of a programming language that does not require you to declare the data types of variables

Back

function braces

Front

the set of curly braces that contain the function statements in a function definition

Back

associativity

Front

the order in which operators of equal precedence execute.

Back

empty string

Front

a zero-length string value.

Back

function call

Front

the code that calls a function, which consists of the function name followed by parentheses, which contain any arguments to be passed to the function.

Back

parameter

Front

a variable that is used within a function

Back

truthy values

Front

all values other than the six falsy values; truthy values are treated in comparison operation as the Boolean value true.

Back

exponential notation

Front

a shortened format for writing very large numbers or numbers with many decimal places, in which numbers are represented by a value between 1 and 10 multiplied by 10 raised to some power.

Back

compound assignment operators

Front

assignment operators oter that the equal sign, which perform mathematical calculations on variables and literal values in an expression, and then assign a new value to the left operand.

Back

passing arguments

Front

sending arguments to the parameters of a called function

Back

arithmetic operators

Front

operators used to perform mathematical calculations, such as addition, subtraction, multiplication, and division.

Back