Java/C2/For-Loop/English - Revision history

Sneha at 05:56, 9 May 2013

2013-05-09T05:56:32Z

Arya Ratish at 13:49, 24 January 2013

2013-01-24T13:49:28Z

Arya Ratish at 12:54, 23 January 2013

2013-01-23T12:54:41Z

Arya Ratish at 11:11, 21 January 2013

2013-01-21T11:11:40Z

Arya Ratish at 11:05, 21 January 2013

2013-01-21T11:05:33Z

Pratham920: Created page with ''''Title of script''': for loop in Java '''Author''': TalentSprint '''Keywords:''' conditions, loops, for loop, video tutorial {| style="border-spacing:0;" | style="border:1…'

2012-12-07T11:14:30Z

Created page with ''''Title of script''': for loop in Java '''Author''': TalentSprint '''Keywords:''' conditions, loops, for loop, video tutorial {| style="border-spacing:0;" | style="border:1…'

New page

'''Title of script''': for loop in Java

'''Author''': TalentSprint

'''Keywords:''' conditions, loops, for loop, video tutorial

{| style="border-spacing:0;"
| style="border:1pt solid #000000;padding:0.097cm;"| '''Visual Cue '''
| style="border:1pt solid #000000;padding:0.097cm;"| '''Description'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 1

'''Welcome'''
| style="border:1pt solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''for loop'''.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 2

'''Learning Outcomes'''
| style="border:1pt solid #000000;padding:0.097cm;"| In this tutorial, you will learn how to use the '''for loop in Java.'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 3

'''Tools Used'''
| style="border:1pt solid #000000;padding:0.097cm;"| For this tutorial we are using

* '''Ubuntu 11.10''',
* '''JDK 1.6''' and
* '''Eclipse 3.7.0'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 4

'''Prerequisites'''
| style="border:1pt solid #000000;padding:0.097cm;"| For this tutorial, you should have knowledge on '''relational operators in Java.'''

If not, please go through the tutorials on these topics available at our website [http://spoken-tuitorial.org/ http][http://spoken-tuitorial.org/ ://][http://spoken-tuitorial.org/ spoken][http://spoken-tuitorial.org/ -][http://spoken-tuitorial.org/ tutorial][http://spoken-tuitorial.org/ .][http://spoken-tuitorial.org/ org][http://spoken-tuitorial.org/ .]

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 5

'''Syntax'''
| style="border:1pt solid #000000;padding:0.097cm;"| Here is the syntax of the '''for loop'''.

Now, let us try out an example in '''Eclipse.'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Minimize Slides and open Eclipse

Eclipse should contain the following code

'''public class ForLoopDemo{'''

'''public static void main(String<nowiki>[] </nowiki>args){'''

'''}'''

'''}'''
| style="border:1pt solid #000000;padding:0.097cm;"| We have the skeleton required.

We have a '''class''' named '''ForLoopDemo'''.

Let us add the '''for loop''' inside the '''main method'''.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Inside the main function, type

'''int i<nowiki>;</nowiki>'''

'''for (i = 0; i<nowiki> < 10; </nowiki>i = i + 1)'''

Highlight''' '''when you explain.
| style="border:1pt solid #000000;padding:0.097cm;"| Inside the main function, type '''int i '''''semicolon''.

Then type '''for '''''within brackets'' '''i '''''equal to''''' 0 '''''semicolon'' '''i '''''less than '''''10''' ''semicolon''''' i '''''equal to'' '''i '''''plus '''''1'''.

This statement decides how the loop is going to progress.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Highlight i = 0
| style="border:1pt solid #000000;padding:0.097cm;"| This is the starting condition for the loop.

This condition allows the variable to be initialized.

|-
| style="border:1pt solid #000000;padding:0.176cm;"| Highlight i<nowiki> < 10</nowiki>
| style="border:1pt solid #000000;padding:0.176cm;"| This is the loop running condition.

If the condition is true then the for block will be executed.

Else it will be ignored.

That means when i becomes more than or equal to 10, the block is not executed.

|-
| style="border:1pt solid #000000;padding:0.176cm;"| Highlight i = i + 1
| style="border:1pt solid #000000;padding:0.176cm;"| This states how the loop variable is going to change.

Here, the value of i starts with 1.

It keeps increasing by 1 for every iteration of the loop until it becomes 10.

Now let us do something with i.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Change for (i = 0; i<nowiki> < 10; </nowiki>i = i + 1) to for (i = 0; i<nowiki> < 10; </nowiki>i = i + 1) {

System.out.println( i * i );

}

Highlight the println statement and explain.
| style="border:1pt solid #000000;padding:0.097cm;"| Now, open curly brackets.

Next line type '''System''' ''dot''''' out '''''dot '''''println''' within brackets '''i''' ''into'' '''i'''.

This will print the square of each number from 1 to 10.

Let us see the output.

So '''save''' and '''run''' the file.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Save and run. Point to output
| style="border:1pt solid #000000;padding:0.097cm;"| As we can see, the loop ran over numbers from 1 to 10.

The square of the number has been printed in each iteration.

Now let us print all the 2 digit numbers that are multiples of 3 or 5.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Change '''i = 0''' to '''i = 10'''
| style="border:1pt solid #000000;padding:0.097cm;"| So, '''i '''should have values from 10 to 99.

So change''' i''' ''equal to'' '''0''' to '''i '''''equal to '''''10'''.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Change '''i<nowiki> < 10</nowiki>''' to '''i<nowiki> < 100</nowiki>'''
| style="border:1pt solid #000000;padding:0.097cm;"| Change '''i '''''less than'' '''10''' to '''i '''''less than'' '''100'''.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Change '''System.out.println( i * i )''' to

'''if ((i % 3 == 0) || (i % 5 == 0)){'''

'''System.out.println(i);'''

'''}'''
| style="border:1pt solid #000000;padding:0.097cm;"| Delete '''System''' ''dot'' '''out''' ''dot'' '''println '''within brackets '''i''' ''into'' '''i'''.

We print the number only if it is a multiple of 3 or 5.

So type,

'''if '''within brackets '''i''' ''mod'' '''3''' ''double equal to'' '''0 '''or''' i '''''mod'' '''5 '''''double equal to '''''0'''.

This statement checks whether '''i '''is divisible by '''3 '''or by '''5'''.

Then, next line type '''System''' ''dot'' '''out '''''dot'' '''println''' within brackets '''i'''.

Now, let us see the output.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Save and run. Highlight the output
| style="border:1pt solid #000000;padding:0.097cm;"| We can see that the numbers are either multiples of 3 or of 5.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Minimize the '''Eclipse''' window and switch to slides.

Slide 6

'''Summary'''
| style="border:1pt solid #000000;padding:0.097cm;"| We have come to the end of this tutorial.

In this tutorial we have learnt how to '''use for loop in java.'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 7'''Assignment'''
| style="border:1pt solid #000000;padding:0.097cm;"| A three digit number is called Armstrong Number if it is equal to the sum of cubes of its digits.

For example, 153 is equal to 1 cube plus 5 cube plus 3 cube.

Find all such 3 digit numbers.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 8'''About the Spoken Tutorial Project'''

* Watch the video available at[http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ://][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial spoken][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial -][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial .][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial org][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial /][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial What][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial is][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial a][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial Spoken][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial Tutorial]

* It summarises the Spoken Tutorial project

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

| style="border:1pt solid #000000;padding:0.097cm;"| To know more about the '''Spoken Tutorial''' project, watch the video available at the following link, that summarises the project.Alternatively, you can download and watch it.

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 9'''Spoken Tutorial Workshops'''The Spoken Tutorial Project Team

* Conducts workshops using spoken tutorials

* Gives certificates for those who pass an online test

* For more details, please write to [mailto:contact@spoken-tutorial.org contact][mailto:contact@spoken-tutorial.org @][mailto:contact@spoken-tutorial.org spoken][mailto:contact@spoken-tutorial.org -][mailto:contact@spoken-tutorial.org tutorial][mailto:contact@spoken-tutorial.org .][mailto:contact@spoken-tutorial.org org]

| style="border:1pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team. Conducts workshops using '''spoken tutorials''' and gives certificates for those who pass an online test. For more details, please write to '''contact AT spoken HYPHEN tutorial DOT org.'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 10'''Acknowledgement'''

* 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

* [http://spoken-tutorial.org/NMEICT-Intro http][http://spoken-tutorial.org/NMEICT-Intro ://][http://spoken-tutorial.org/NMEICT-Intro spoken][http://spoken-tutorial.org/NMEICT-Intro -][http://spoken-tutorial.org/NMEICT-Intro tutorial][http://spoken-tutorial.org/NMEICT-Intro .][http://spoken-tutorial.org/NMEICT-Intro org][http://spoken-tutorial.org/NMEICT-Intro /][http://spoken-tutorial.org/NMEICT-Intro NMEICT][http://spoken-tutorial.org/NMEICT-Intro -][http://spoken-tutorial.org/NMEICT-Intro Intro]

| style="border:1pt solid #000000;padding:0.097cm;"| '''Spoken Tutorial '''Project is a part of the '''Talk to a Teacher''' project and is supported by the '''National Mission on Education through ICT, MHRD, Government of India. '''More information on this Mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''

|-
| style="border:1pt solid #000000;padding:0.097cm;"| Slide 11'''About the contributor'''

* This script has been contributed by '''TalentSprint'''
* '''www.talentsprint.com'''

* Thanks for joining

| style="border:1pt solid #000000;padding:0.097cm;"| This script has been contributed by '''TalentSprint'''.

This is Prathamesh Salunke signing off.

Thanks for joining.

|}

@@ Line 15: / Line 15: @@
 '''Welcome'''
-| style="border:1pt solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''for loop'''.
+| style="border:1pt solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''for loop''' i  java.
 |-
@@ Line 42: / Line 42: @@
-If not, please go through the tutorials on these topics available at our website [http://spoken-tuitorial.org/ http][http://spoken-tuitorial.org/ ://][http://spoken-tuitorial.org/ spoken][http://spoken-tuitorial.org/ -][http://spoken-tuitorial.org/ tutorial][http://spoken-tuitorial.org/ .][http://spoken-tuitorial.org/ org][http://spoken-tuitorial.org/ .]
+If not, for relevant tutorial please  visit  our website which is as shown [http://spoken-tuitorial.org/ http][http://spoken-tuitorial.org/ ://][http://spoken-tuitorial.org/ spoken][http://spoken-tuitorial.org/ -][http://spoken-tuitorial.org/ tutorial][http://spoken-tuitorial.org/ .][http://spoken-tuitorial.org/ org][http://spoken-tuitorial.org/ .]
 |-
@@ Line 49: / Line 49: @@
 '''Syntax'''
 | style="border:1pt solid #000000;padding:0.097cm;"| Here is the syntax of the '''for loop'''.
-It consisits of initializastion, loop condition and incriment.
+It consisits of initialization, loop condition and increment.
 Then it has the for block which keeps on executing till the loop condition is true.
@@ Line 66: / Line 66: @@
 '''}'''
-| style="border:1pt solid #000000;padding:0.097cm;"| We have the skeleton required.
+| style="border:1pt solid #000000;padding:0.097cm;"| So switch to '''eclipse'''
+We already have a '''class''' named '''ForLoopDemo'''.
-−
 We have a '''class''' named '''ForLoopDemo'''.
@@ Line 83: / Line 81: @@
 Highlight''' '''when you explain.
-| style="border:1pt solid #000000;padding:0.097cm;"| Inside the main function, type '''int i '''''semicolon''.
+| style="border:1pt solid #000000;padding:0.097cm;"| So Inside the main function, type '''int i '''''semicolon''.
-Then type '''for '''''within brackets'' '''i '''''equal to''''' 0 '''''semicolon'' '''i '''''less than '''''10''' ''semicolon''''' i '''''equal to'' '''i '''''plus '''''1'''.
+Then  '''for '''''open curly braces'' '''i '''''equal to''''' 0 '''''semicolon'' '''i '''''less than '''''10''' ''semicolon''''' i '''''equal to'' '''i '''''plus '''''1'''.
@@ Line 93: / Line 91: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| Highlight i = 0
-| style="border:1pt solid #000000;padding:0.097cm;"| This is the starting condition for the loop.
+| style="border:1pt solid #000000;padding:0.097cm;"| i =0 is the starting condition for the loop.
 This condition allows the variable to be initialized.
-−
+-
-|-
 | style="border:1pt solid #000000;padding:0.176cm;"| Highlight i<nowiki> < 10</nowiki>
-| style="border:1pt solid #000000;padding:0.176cm;"| This is the loop running condition.
+| style="border:1pt solid #000000;padding:0.176cm;"| i<10   is the loop running condition.
@@ Line 113: / Line 110: @@
 |-
 | style="border:1pt solid #000000;padding:0.176cm;"| Highlight i = i + 1
-| style="border:1pt solid #000000;padding:0.176cm;"| This states how the loop variable is going to change.
+| style="border:1pt solid #000000;padding:0.176cm;"|Then i= i+1 ,  states how the loop variable is going to change.
@@ Line 133: / Line 130: @@
 Highlight the println statement and explain.
-| style="border:1pt solid #000000;padding:0.097cm;"| Now, open and close curly brackets.
+| style="border:1pt solid #000000;padding:0.097cm;"|So open and close curly brackets.
-Next line type '''System''' ''dot''''' out '''''dot '''''println''' within brackets '''i''' ''into'' '''i'''.
+ Inside the curly brackets type '''System''' ''dot''''' out '''''dot '''''println''' and print  '''i''' ''into'' '''i'''.
@@ Line 145: / Line 142: @@
-So '''save''' and '''run''' the file.
+So '''save''' and '''run''' the program
-−
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| Save and run. Point to output
-| style="border:1pt solid #000000;padding:0.097cm;"| As we can see, the loop ran over numbers from 0 to 9.
+| style="border:1pt solid #000000;padding:0.097cm;"| As we can see, the loop run over numbers from 0 to 9.
@@ Line 176: / Line 172: @@
 '''}'''
-| style="border:1pt solid #000000;padding:0.097cm;"| Delete '''System''' ''dot'' '''out''' ''dot'' '''println '''within brackets '''i''' ''into'' '''i'''.
+| style="border:1pt solid #000000;padding:0.097cm;"|
+Then inside the curly brackets We print the number only if it is a multiple of 3 or 5.
-−
 We print the number only if it is a multiple of 3 or 5.
 So type,
-'''if '''within brackets '''i''' ''mod'' '''3''' ''double equal to'' '''0 '''or''' i '''''mod'' '''5 '''''double equal to '''''0'''.
+'''if '''within brackets '''i''' ''mod'' '''3''' ''double equal to'' '''0 '''or''' within brackets i '''''mod'' '''5 '''''double equal to '''''0'''.
@@ Line 190: / Line 184: @@
-Then, next line type '''System''' ''dot'' '''out '''''dot'' '''println''' within brackets '''i'''.
+Then, in curly  bracket we print the value of i
-−
 Now, let us see the output.
@@ Line 200: / Line 194: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| Save and run. Highlight the output
-| style="border:1pt solid #000000;padding:0.097cm;"| We can see that the numbers are either multiples of 3 or of 5.
+| style="border:1pt solid #000000;padding:0.097cm;"| We can see that the numbers are either multiples of 3 or    5. In this way we use for loop in Java
 |-
@@ Line 215: / Line 209: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| Slide 7'''Assignment'''
-| style="border:1pt solid #000000;padding:0.097cm;"| A three digit number is called Armstrong Number if it is equal to the sum of cubes of its digits.
+| style="border:1pt solid #000000;padding:0.097cm;"|For assignment A three digit number is called Armstrong Number if it is equal to the sum of cubes of its digits.

← Older revision		Revision as of 12:54, 23 January 2013
Line 39:		Line 39:

	'''Prerequisites'''		'''Prerequisites'''
−	\| style="border:1pt solid #000000;padding:0.097cm;"\| For this tutorial, you should have knowledge on '''relational operators ~~in Java.~~'''	+	\| style="border:1pt solid #000000;padding:0.097cm;"\| For this tutorial, you should have knowledge on '''relational operators ''' and '''if statement''' in Java.

@@ Line 115: / Line 115: @@
-Here, the value of i starts with 1.
+Here, the value of i starts with 0.
@@ Line 132: / Line 132: @@
 Highlight the println statement and explain.
-| style="border:1pt solid #000000;padding:0.097cm;"| Now, open curly brackets.
+| style="border:1pt solid #000000;padding:0.097cm;"| Now, open and close curly brackets.
@@ Line 138: / Line 138: @@
-This will print the square of each number from 1 to 10.
+This will print the square of each number from 0 to 9.
@@ Line 148: / Line 148: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| Save and run. Point to output
-| style="border:1pt solid #000000;padding:0.097cm;"| As we can see, the loop ran over numbers from 1 to 10.
+| style="border:1pt solid #000000;padding:0.097cm;"| As we can see, the loop ran over numbers from 0 to 9.
@@ Line 157: / Line 157: @@
 |-
-| style="border:1pt solid #000000;padding:0.097cm;"| Change '''i = 0''' to '''i = 10'''
+| style="border:1pt solid #000000;padding:0.097cm;"| Change '''i = 0''' to '''i = 9'''
 | style="border:1pt solid #000000;padding:0.097cm;"| So, '''i '''should have values from 10 to 99.