Difference between revisions of "BASH/C2/Array-Operations-in-BASH/English-timed"

| Welcome to the '''spoken tutorial''' on '''Array operations in BASH'''.

| In this tutorial, we will learn how to:

| * Initialize an''' Array''' during declaration.

| * To find length of an ''' Array''' and its n'th '''element'''.

|  * To print an '''Array'''.

| For relevant tutorials, please visit: spoken hyphen tutorial dot org.

|For this tutorial, I am using:

| '''GNU Bash '''version 4 or above is recommended for practice.

| * An '''Array''' is a '''variable''' with multiple '''values'''.

| * The values can be of same or different types.

| * There is no maximum limit for the '''size''' of an '''array'''.

| * '''Array''' members need not be consecutive.

| * '''Array index''' always starts with '''zero'''.

| We will now see how to declare and assign a '''value''' to an '''Array'''.

| The syntax to declare an '''Array''' is-  

| It is a built-in '''command''' in '''Bash'''.

| '''Name''' within square brackets '''index''' equals to within single quotes '''value.'''

| Now, let see how to initialize an '''Array''' during declaration.

|* '''Elements''' Should be separated by a '''space''' .

| Each '''element''' should be within '''parentheses'''.

| The syntax is '''declare hyphen `a` arrayname equal to within round brackets within single quotes 'element1' , 'element2'''' and '''element3''' .

| We use the ampersand to free up the prompt. Press '''Enter'''.

| Type the '''code''' as shown here, in your ''' array.sh '''file'''.

* '''Fedora'''.

| Here hyphen `a` is a '''flag.'''

| Let us switch back to the '''slides'''.

| Dollar sign opening curly bracket hash '''arrayname''' within square bracket At sign (@) and closing curly bracket.

| The length of the n'th '''element''' can be obtained by this syntax:

| Dollar sign opening curly bracket hash arrayname within square brackets  `n` and closing curly bracket.

| Here 'n' is the '''element''' number whose length is to be found.

| Dollar sign opening curly bracket '''arrayname''' within square brackets `At sign` and closing curly bracket.'''

| Now, switch to the '''Terminal.'''

| Type: '''dot slash array .sh'''. Press '''Enter.'''

|The number of elements or the length of the '''Array `Linux`''' is four.

| The 3rd element of  '''Array Linux''' is ''' Ubuntu'''.

| And the number of characters in the third element is six, as expected.

| This brings us to the end of this tutorial.

| Let us summarize. Come back to our '''slides'''.

| In this tutorial, we learnt to: 

| * To print whole ''' Array'''.

|As an assignment-

| Declare an array '''names''' of length 7 and find:

|* And print the 5th element.

|Watch the video available at the link shown below.

| It summarizes the Spoken-Tutorial project.

| If you do not have good bandwidth, you can download and watch it.

| The Spoken Tutorial Project team:

| Conducts workshops using spoken tutorials.

| Gives certificates to those who pass an online test.

|Spoken Tutorial Project is a part of the "Talk to a Teacher" project

| It is supported by the National Mission on Education through ICT, MHRD, Government of India.

| More information on this mission is available at the link shown below.

| The script has been contributed by FOSSEE and spoken-tutorial teams.