1
/
7
C173/D278 Study Questions by Competency
1.
What
is
the
purpose
of
a
variable?:
a named item like x, used to hold a value.
2.
How do you save a value to a variable?: An assignment statement assigns a variable with a
value.
(x = 0)
3.
What is a programming expression?: A number, variable (x), or simple calculation (numApples
+
1).
4.
What
is
an
identifier?:
A name created for a variable or a function.
5.
What
constitutes
a
valid
identifier?:
An identifier must start with a letter and be a sequence of
letters,
underscores, and digits.
6.
What
is
a
literal?:
any number, text, or other information that directly represents a value.
7.
What
is
an
operator?:
a
symbol
that
performs
a
built-in
calculation.
(+,
-,
*,
/)
8. What precedence rules does programming use?: PEMDAS
9.
How does an integer differ from a float?: Integers are whole numbers and used for counted values.
Floats
allow
the
decimal
point
to
appear
anywhere
in
the
number
and
are
used
for
values
that
are
measured
or
fractions.
10.
What
happens
if
you
divide
two
integers?:
you will get an integer or the answer will be cut
short
11. what happens if you divide an integer and float?:
It returns a float
12.
What happens if you divide a nonzero floating point number by zero?:
In
coral
