Information Technology Reference
In-Depth Information
statement is 0. If you say that
z
is only two positions long since it has the value “70”, I
need to remind you that previously we had defined
z
as a field having 3 characters.
What will the statements
z
= “70”
answer
=
index
(x, z)
yield? What we are asking is if the string
01234567
can be found in the string
70
.
Well the 0 and the 7 can but that's about it so the result for
answer
is 0.
What will the statements
define
x
character
(8)
value
“01234567”
define
y
character
value
“2”
define
z
character
(3)
value
“789”
define
answer
integer
answer
=
index
(
index
(z, y), x)
yield? First note that
index
(z, y)
will be evaluated first and the result will be 0 since none of the characters
7
,
8
or
9
can be
found in the string
y
,
which has a value of 2. Thus the line reduces to
answer
=
index
(“0”,
x
)
and this is asking if 0 is in the string
x
.
It certainly is so the result is that
answer
winds up with the value 1. This is a farfetched example that you probably will never
encounter but if you understand it, you have a good grasp of the
index
keyword.
For your assignment, assume your boss likes to get involved in what you're doing
- like constantly looking over your shoulder. This may seem like an outlandish request,
but just pretend you're working in the department of information technology - or
whatever it's called today - at a corporation in America. The manager asks you for this:
Write a program that will allow someone to set up some accounts for the account
number file. The user will enter last name, first name, middle initial and an account
