Linux - Shell arrays

now till now we have seen how we can set

the variables for into our program

different types of variable how we can

use into our shell program as well as we

have seen certain set of the

pre-existing variables which we have

that is a special variable into Linux

operating system now here we are going

to see how many kind of variable and

what the types of variables and really

will be using for creating an array of

data into a special variable or into a

particular variable that's the reason we

are going to see how we can add multiple

values into a same array called as shell

arrays so into this shell arrays we have

two type of array which we generally

create called as a scalar array and also

the array scalar variables are those

variables which can store only one data

at a time into the variable for example

a equals to 1 that is the scalar a

variable now if I'm talking about the

area of data or area of value we want to

add into a particular variable I'll be

using an array so avek equals to the

number of variables or the number of

values you want to add you can add into

the aring so let us see how we can use

or how we can add multiple values into a

particular variable into the linux shell

script things so let us begin with our

terminal now so into our previous video

we have defined a variable or an a

special kind of variable they were a

scalar variable scalar variables means

they can store only one file at a time

so let us check what we have done there

and why we are moving into the array not

as such like no we are going to define

the array values so if I take an example

I'm going to define the name as Jones

and again I'm going to define the

variable as Gerry but here the variable

is the same and the values are different

and if I define or if I check for you

know printing a particular file or the

name here by defining in such a way I'll

just save it correct

and when I run this particular file

stuff well it is just showing me during

what it will do is but we'll just ignore

the variable value you have added at the

first stage and we'll take the latest

one so that's what has pulled so but now

I want to use the same variables and I

want to add multiple values like for

example if you are schooling or if

you're in college you will win the same

standard right so the class will be seen

so if a class is same or I am going to

add multiple students into the class

same here we are going to add this

particular names of the you know people

into the name variable so for that for

adding multiple values into a variable

is called as area variable we are going

to add for that what I'm going to do is

I'll be adding just an index here

that is name and value zero same we can

add name value one right again if I want

to add more I know

names to the same variable we can use

this

we and I've defied name

and then right

and next we are going to add us for

right but there are many enough file we

have added now if I want to display this

entries and I want to know call those

names what I'll be doing is I'll be

defining it at dollar sign and name

along with the name we need to define

the index just close the bracket here so

what it will do it will print name zero

so this is how it will call your first

name or we can also use you know curly

braces here so I can also use the curly

braces like this way and here I can

this way right so it will print the

first ring I want to print the hardening

so I'll give a game the same way

forget braces name

that is is second because we are

starting from one so I want the third

name to be display let us check will

give and run the file name a video

message

it's either a certain error and he just

look where we have media okay so here I

need to close this quotations as well

let's check now as such later as a trail

showing you hello Joan and hello Ellie

so this is what how we add the area of

your different names or different values

to the same particular parameter now

whatever if I wanted to check all the

names at the time so for that I can also

give the command here I'll give the

instruction I'll be using this same

special kind of variables to display the

complete variable that I'm going to do

is in such a way echo

names equals two

list of array values I'm going to define

R comma dollar and s trick right

but dollar our next trick we are again

going to define in such a way again

we'll start dollar again we are going to

start with name into the square brackets

I'll define it this way close your curly

braces and then just correct either you

can use as trick or you can use your

address sign both walks here I cancel if

I am last Jew are they right so again

the same be

name your in spite of you know Eric I

can also define I'd rate

I'm going to close the braces and

curtisha same if I want to check for the

count of your erase

so I'll define simply color

curly braces name no value we'll just

define hash okay so let us firm this all

such peridot okay so it's not accepting

the account okay but the others are

possible so I let me remove the account

here

you

so you can check now

so we can also check for the counter

drone that they are going to see but

here now it is showing you the list of

the all the array values you have added

to it right so these are the four values

I have added starting from 0 through 3

my in the same way we can check into the

cat array dot message right so this is

our d 4 to 5 values I've added so

starting from your jones cherry sadly an

en Sony so these are the values I'm able

to display here so this is how you can

add a number of values into the same

variable forming an array so into next

video we are going to see more about

your different you know and once

programming where I'm going to show you

how you can use the operators into your

programs until now we were working on

the complete attacking text documents

now I'm going to use some numbers and

I'm going to operate door number two

years ago sorry thematical operators