New WGU C173 UPDATED ACTUAL Questions and CORRECT Answers
variable named item such as X or numPeople which is used to hold value
assignment statement assigns a variable with a value such as x = 5, statement means X is assigned with 5
and X keeps the value during subsequent statements until X is assigned again
variable declaration declares a new variable specifying the variable's name and type
integer can hold whole number values like 1, 999, 0, or -25 but not 3.5 or 0.001
assignment statement assigns the variables on the left side of the = with the current value of the right
side expressions Ex: numApples = 8 assigns numApples with the value of the right
side expressions in this case an 8
expression may be a number like 80, a variable name like numApples, or a simple calculation
like numApples + 1, simple calculations can involve standard math operations like
+, -, , and parentheses as in 2(numApples -1)
identifier A name created by a programmer for an item like a variable or function, an
identified must be a sequence of letters (a-z, A-Z), underscores (_), and digits (0-
9), they are case sensitive
reserved word (or keyword) word that is part of the language like integer, Get, or Put, programmer cannot use
reserved word as a identifier
naming conventions set of style guidelines defined by a company, team, teacher, etc., for naming
variables.
Two common conventions for distinguishing words in an Camel case: Lower camel case abuts multiple words, capitalizing each word
identifier are: except the first, as in numApples or peopleOnBus.
Underscore separated: Words are lowercase and separated by an underscore, as
in num_apples or people_on_bus.
expression a combination of items, like variables, literals, operators, and parentheses, that
evaluates to a value. Ex: 2 (x + 1) is an expression. If x is 3, the expression
evaluates to the value 8. Expressions are commonly used on the right side of an
assignment statement, as in y = 2 (x + 1).
literal a specific value in code like a 2
operator a symbol that performs a built-in calculation, like the operator + which performs
addition.
, An expression evaluates to a value replaces the expression. Ex: If x is 5, then x + 1 evaluates to 6, and y = x + 1 assigns y
with 6.
An expression is evaluated using the order of standard mathematics, such order
known in programming as precedence rules, listed below.
unary minus A good practice is to include a single space around operators for readability, as in
numItems + 2, rather than numItems+2. An exception is minus used as negative, as
in: xCoord = -yCoord. Minus (-) used as negative
incremental development the process of writing, compiling, and testing a small amount of code, then
writing, compiling, and testing a small amount more (an incremental amount), and
so on.
variable named item such as X or numPeople which is used to hold value
assignment statement assigns a variable with a value such as x = 5, statement means X is assigned with 5
and X keeps the value during subsequent statements until X is assigned again
variable declaration declares a new variable specifying the variable's name and type
integer can hold whole number values like 1, 999, 0, or -25 but not 3.5 or 0.001
assignment statement assigns the variables on the left side of the = with the current value of the right
side expressions Ex: numApples = 8 assigns numApples with the value of the right
side expressions in this case an 8
expression may be a number like 80, a variable name like numApples, or a simple calculation
like numApples + 1, simple calculations can involve standard math operations like
+, -, , and parentheses as in 2(numApples -1)
identifier A name created by a programmer for an item like a variable or function, an
identified must be a sequence of letters (a-z, A-Z), underscores (_), and digits (0-
9), they are case sensitive
reserved word (or keyword) word that is part of the language like integer, Get, or Put, programmer cannot use
reserved word as a identifier
naming conventions set of style guidelines defined by a company, team, teacher, etc., for naming
variables.
Two common conventions for distinguishing words in an Camel case: Lower camel case abuts multiple words, capitalizing each word
identifier are: except the first, as in numApples or peopleOnBus.
Underscore separated: Words are lowercase and separated by an underscore, as
in num_apples or people_on_bus.
expression a combination of items, like variables, literals, operators, and parentheses, that
evaluates to a value. Ex: 2 (x + 1) is an expression. If x is 3, the expression
evaluates to the value 8. Expressions are commonly used on the right side of an
assignment statement, as in y = 2 (x + 1).
literal a specific value in code like a 2
operator a symbol that performs a built-in calculation, like the operator + which performs
addition.
, An expression evaluates to a value replaces the expression. Ex: If x is 5, then x + 1 evaluates to 6, and y = x + 1 assigns y
with 6.
An expression is evaluated using the order of standard mathematics, such order
known in programming as precedence rules, listed below.
unary minus A good practice is to include a single space around operators for readability, as in
numItems + 2, rather than numItems+2. An exception is minus used as negative, as
in: xCoord = -yCoord. Minus (-) used as negative
incremental development the process of writing, compiling, and testing a small amount of code, then
writing, compiling, and testing a small amount more (an incremental amount), and
so on.
