Perl Tutorial - 5: Arrays Video Lecture | Perl Building Blocks: An Introduction to Perl - Back-End Programming

hello guys welcome to my channel this is
the fifth tutorial in this course and in
this tutorial we are going to talk about
arrays in Perl so an array is a variable
that stores an ordered list of scalar
values so you could store one in a
scalar variable you could store two in a
scalar variable you could have another
scalar variable that has a value 3 or
you could create a single array variable
that holds all three values and it's not
that in a ray you can only put numbers
you could also put strings so that's why
in this script which is called arrays I
have created two array variables the
first ones called ranks and the second
ones called names and as you must have
noticed by now that I haven't used a
dollar symbol to create these arrays I
have used the at the rate symbol instead
so you create scalar variables using the
dollar symbol and you create array
variables using the at the rate symbol
and the reason why you might think of
using arrays is that instead of you know
having multiple scalar variables for
storing different values of the same
type you could just create array
variables and put all those values in a
single variable right and you type in
the address symbol the name of your
array and then the equal to symbol or
the assignment operator and then the
values have to be placed within a pair
of parentheses and obviously you have to
separate them with a comma so if you
want to store string values and you have
to put your string values within single
quotes or double quotes and of course
the common has to be outside the quotes
right so in this script I have created
the an array variable called ranks on
line number 3 it has the values 1 2 & 3
on line number 4 I have another array
variable called names and this one has
the values Novak roger and andy and then
on line number 6 and line number 7 i
have two print statements and these are
just going to print
contents of these two array variables
and just as you use a print statement to
print the contents of a scalar variable
the syntax is the same so you know just
between pair of double quotes you would
type in the address symbol and the name
of your variable so I'm printing out the
ranks first and then the names and let's
say you want to print a specific element
in an array so on line number nine I
have a print statement for printing the
name of the top player which in this
list would be Novak Djokovic at the
moment so I want to print Novak and like
in most other programming languages in
Perl - we have indices for individual
elements in an array so the index of the
first element is 0 the index of the
second element is 1 and that's how we
proceed so if you want to see Novak and
just Novak then you would have to type
the name of your array which in our case
is names along with the address number
of course and then within a pair of
square brackets you would have to type
the index of the element you want to see
so that in our case would be 0 so enough
talking I will show you guys the output
of the script when we run it so all
ranks we see 1 2 3 all names we see
Novak Roger 90 and then for top layer we
see Novak right so that is exactly what
was expected from the script I hope you
guys had fun watching this tutorial in
the next tutorial we are going to check
out another Perl concept and you may
subscribe to my channel if you haven't
already I'm going to see you soon till
then take care