Difference between revisions of "Java/C2/Relational-Operations/English-timed"

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|-
 
|-
 
| 00:09
 
| 00:09
−
|  '''the boolean data type'''
+
|  ''' boolean data type'''
  
 
|-
 
|-
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|-
 
|-
 
|  00:17
 
|  00:17
−
|  For this tutorial we are using  
+
|  For this tutorial, we are using  
  
 
'''Ubuntu 11.10''',  
 
'''Ubuntu 11.10''',  
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|-
 
|-
 
| 00:26
 
| 00:26
−
|  To follow this tutorial, you must have knowledge of '''data types '''in''' Java'''
+
|  To follow this tutorial, you must have knowledge of '''data types''' in '''Java'''.
−
 
+
  
 
|-
 
|-
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|  00:39
 
|  00:39
 
| Relational operators are used to check for conditions.
 
| Relational operators are used to check for conditions.
−
 
  
 
|-
 
|-
 
| 00:43
 
| 00:43
  
−
|  Their output is a variable of boolean data type
+
|  Their output is a variable of '''boolean''' data type
−
 
+
  
 
|-
 
|-
 
| 00:48
 
| 00:48
−
|  A  boolean data type is of size  1 bit   
+
|  A  '''boolean''' data type is of size  1 '''bit'''.  
−
 
+
  
 
|-
 
|-
 
| 00:51
 
| 00:51
 
|  It stores only two values.
 
|  It stores only two values.
−
 
  
 
|-
 
|-
 
| 00:54
 
| 00:54
 
|  '''True '''or '''False. '''
 
|  '''True '''or '''False. '''
−
 
  
 
|-
 
|-
 
| 00:56
 
| 00:56
 
|  '''True''' is the output when the condition is true.
 
|  '''True''' is the output when the condition is true.
−
 
  
 
|-
 
|-
Line 81: Line 74:
 
|  01:06
 
|  01:06
 
|  Here is a list of the Relational operators available.
 
|  Here is a list of the Relational operators available.
−
 
  
 
|-
 
|-
Line 116: Line 108:
 
|-
 
|-
 
| 01:33
 
| 01:33
−
|  I have created a class '''BooleanDemo''' and added the '''Main''' method.
+
|  I have created a class '''BooleanDemo''' and added the '''Main method'''.
−
 
+
  
 
|-
 
|-
Line 125: Line 116:
 
|-
 
|-
 
| 01:41   
 
| 01:41   
−
|  Type '''boolean b ; '''
+
|  Type '''boolean b ;'''
−
 
+
  
 
|-
 
|-
 
| 01:47
 
| 01:47
 
|  The keyword '''boolean''' declares the data type of the variable '''b''' as '''boolean.'''
 
|  The keyword '''boolean''' declares the data type of the variable '''b''' as '''boolean.'''
−
 
  
 
|-
 
|-
Line 139: Line 128:
 
|-
 
|-
 
|  01:58
 
|  01:58
−
|  We shall define a variable weight and check for a condition using that variable.
+
|  We shall define a variable '''weight''' and check for a condition using that variable.
−
 
+
  
 
|-
 
|-
 
| 02:05
 
| 02:05
−
|  '''int weight '''''equal to '''''45;'''
+
|  '''int weight ''' equal to '''45;'''
−
 
+
  
 
|-
 
|-
 
| 02:13
 
| 02:13
 
|  We shall check if the value in '''weight''' is greater than '''40.'''
 
|  We shall check if the value in '''weight''' is greater than '''40.'''
−
 
  
 
|-
 
|-
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|-
 
|-
 
| 02:28
 
| 02:28
−
|  This statement says check if the value of variable is greater than 40 and store the result in b;
+
|  This statement says check if the value of variable is greater than 40 and store the result in 'b';
  
 
|-
 
|-
 
| 02:37
 
| 02:37
−
|  Now Let us print the value of b.
+
|  Now Let us print the value of 'b'.
−
 
+
  
 
|-
 
|-
 
| 02:41
 
| 02:41
−
|  '''System '''''dot '''''out '''''dot '''''println(b);'''
+
|  '''System ''' dot '''out''' dot '''println(b);'''
−
 
+
  
 
|-
 
|-
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|-
 
|-
 
| 03:02
 
| 03:02
−
|  Let us see what   happens if the value is less than 40.
+
|  Let us see what happens if the value is less than 40.
−
 
+
  
 
|-
 
|-
 
| 03:07
 
| 03:07
 
|  Change '''weight''' to 30.
 
|  Change '''weight''' to 30.
−
 
  
 
|-
 
|-
 
| 03:12
 
| 03:12
−
|  Save and run
+
|  '''Save''' and '''run'''.
  
 
|-
 
|-
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|-
 
|-
 
|  03:24
 
|  03:24
−
|  This way, the''''' '''greater than'' symbol is used to check if one value is ''greater than'' the other.
+
|  This way, the ''greater than'' symbol is used to check if one value is ''greater than'' the other.
−
 
+
  
 
|-
 
|-
 
| 03:30
 
| 03:30
−
|  Similarly, ''less than'' symbol is used to check if one value is'' less than ''the other.
+
|  Similarly, ''less than'' symbol is used to check if one value is ''less than'' the other.
  
 
|-
 
|-
 
|  03:37
 
|  03:37
 
| let us change the''greater than'' to ''less than symbol.''
 
| let us change the''greater than'' to ''less than symbol.''
−
 
  
 
|-
 
|-
 
| 03:43
 
| 03:43
−
|  So We are checking if the value of '''weight''' is less than '''40'''.
+
|  So, We are checking if the value of '''weight''' is less than '''40'''.
−
 
+
  
 
|-
 
|-
 
| 03:48
 
| 03:48
−
|    '''Save''' '''Run'''   
+
|    '''Save''', '''Run'''.  
  
 
|-
 
|-
 
|  03:56
 
|  03:56
−
|  As we can see, the output is '''True '''as expected.
+
|  As we can see, the output is '''True''' as expected.
  
 
|-
 
|-
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|-
 
|-
 
| 04:09  
 
| 04:09  
−
|  Save and Run.
+
|  '''Save''' and '''Run'''.
  
 
|-
 
|-
 
|  04:16
 
|  04:16
 
|  We see that we get a '''False''' because the condition,
 
|  We see that we get a '''False''' because the condition,
−
 
  
 
|-
 
|-
 
| 04:21
 
| 04:21
−
|  '''weight''''' less than '''''40''' is not true.
+
|  '''weight''' ''less than'' '''40''' is not true.
−
 
+
  
 
|-
 
|-
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|  04:31
 
|  04:31
 
|  To do that, we use '''two equal to symbols.'''
 
|  To do that, we use '''two equal to symbols.'''
−
 
  
 
|-
 
|-
 
| 04:35
 
| 04:35
−
|  change ''less than ''symbol'' ''to ''double equal to.''
+
|  Change ''less than'' symbol to ''double equal to.''
−
 
+
  
 
|-
 
|-
 
| 04:41
 
| 04:41
−
|  '''Save''' and '''Run'''   
+
|  '''Save''' and '''Run'''.  
  
 
|-
 
|-
 
|  04:48
 
|  04:48
−
|  As we can see, the output is '''False '''because the value of weight is not equal to 40'''.'''
+
|  As we can see, the output is '''False''' because the value of '''weight''' is not equal to '''40'''.
  
 
|-
 
|-
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|-
 
|-
 
| 05:01
 
| 05:01
−
|  Save and  Run.
+
|  '''Save''' and  '''Run'''.
  
 
|-
 
|-
 
|  05:08  
 
|  05:08  
−
|  As we can see, the output is '''True'''
+
|  As we can see, the output is '''True'''.
−
 
+
  
 
|-
 
|-
 
| 05:12
 
| 05:12
−
|  This way, Double equal to is used for checking equality.
+
|  This way, ''double equal to'' is used for checking equality.
−
 
+
  
 
|-
 
|-
 
| 05:16
 
| 05:16
 
|  Please be careful because, often people use a '''single equal to''' symbol for checking equality.
 
|  Please be careful because, often people use a '''single equal to''' symbol for checking equality.
−
 
  
 
|-
 
|-
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|  05:26
 
|  05:26
 
|  Next we'll see how to check for '''less than or equal to.'''
 
|  Next we'll see how to check for '''less than or equal to.'''
−
 
  
 
|-
 
|-
 
| 05:30
 
| 05:30
 
|  To do that, we will use a '''less than''' symbol followed by an '''equal to''' symbol.
 
|  To do that, we will use a '''less than''' symbol followed by an '''equal to''' symbol.
−
 
  
 
|-
 
|-
 
| 05:35
 
| 05:35
−
|   change the double equal to,  to less than equal to.
+
| Change the ''double equal to'',  to ''less than equal to''.
−
 
+
  
 
|-
 
|-
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|-
 
|-
 
|  05:50
 
|  05:50
−
|   the output is '''True''' as expected.
+
| The output is '''True''' as expected.
−
 
+
  
 
|-
 
|-
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| 06:04
 
| 06:04
 
|  '''Save''' and '''Run.'''
 
|  '''Save''' and '''Run.'''
−
 
  
 
|-
 
|-
 
| 06:14
 
| 06:14
 
|  We see, that although the '''weight''' is not equal to 40 we get the output as '''True''' because it is less than 40.
 
|  We see, that although the '''weight''' is not equal to 40 we get the output as '''True''' because it is less than 40.
−
 
  
 
|-
 
|-
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|-
 
|-
 
|  06:27
 
|  06:27
−
|  Let say 50. Save and Run.
+
|  Let's say 50. '''Save and Run'''.
  
 
|-
 
|-
 
| 06:39
 
| 06:39
 
|As we can see, the output is '''False'''  because the value of '''weight''' is not equal to 40.
 
|As we can see, the output is '''False'''  because the value of '''weight''' is not equal to 40.
−
 
  
 
|-
 
|-
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|-
 
|-
 
| 06:48
 
| 06:48
−
|  Similarly we use a greater than symbol followed by an equal to symbol for checking '''greater than''' or''' equal to'''.
+
|  Similarly, we use a ''greater than'' symbol followed by an ''equal to'' symbol for checking '''greater than''' or''' equal to'''.
−
 
+
  
 
|-
 
|-
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|-
 
|-
 
|  06:57
 
|  06:57
−
|  Change ''less than equal to'' to ''greater than equal to''
+
|  Change ''less than equal to'' to ''greater than equal to''.
−
 
+
  
 
|-
 
|-
 
| 07:04
 
| 07:04
 
|  '''Save''' and '''Run.'''
 
|  '''Save''' and '''Run.'''
−
 
  
 
|-
 
|-
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|-
 
|-
 
|  07: 16
 
|  07: 16
−
|  Let us change weight to a value less than 40. Lets say 30.
+
|  Let us change weight to a value less than 40. Let's say 30.
  
 
|-
 
|-
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|-
 
|-
 
|  07:32
 
|  07:32
−
|  We get a false because the value of '''weight''' is not greater than 40 and also not equal to 40.
+
|  We get a '''false''' because the value of '''weight''' is not greater than 40 and also not equal to 40.
  
 
|-
 
|-
 
|  07:39
 
|  07:39
−
| Next, we’ll see how to check for '''not equal to'''
+
| Next, we’ll see how to check for '''not equal to'''.
−
 
+
  
 
|-
 
|-
 
| 07:46
 
| 07:46
 
|  It is done by using an '''exclamation mark''' followed by an '''equal to''' symbol.
 
|  It is done by using an '''exclamation mark''' followed by an '''equal to''' symbol.
−
 
  
 
|-
 
|-
 
| 07:53
 
| 07:53
−
|  Change ''greater than'' to ''exclamation  ''
+
|  Change ''greater than'' to ''exclamation  ''.
−
 
+
  
 
|-
 
|-
 
| 07:59
 
| 07:59
−
|  So this statement says check if the value of '''weight''' is not equal to '''40''' and store the result in '''b'''
+
|  So this statement says check if the value of '''weight''' is not equal to '''40''' and store the result in '''b'''.
−
 
+
  
 
|-
 
|-
 
| 08:08
 
| 08:08
−
|  '''Save''' and '''Run'''   
+
|  '''Save''' and '''Run'''.  
  
 
|-
 
|-
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|-
 
|-
 
| 08:31
 
| 08:31
−
|  Save. Run.
+
|  '''Save, Run'''.
  
 
|-
 
|-
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|  08:58
 
|  08:58
 
|  This brings us  to the end of this tutorial.  
 
|  This brings us  to the end of this tutorial.  
−
 
  
 
|-
 
|-
 
| 09:01
 
| 09:01
−
|  In this tutorial we have learnt,  about the boolean data type
+
|  In this tutorial we have learnt about: the boolean data type
  
 
|-
 
|-
 
| 09:06
 
| 09:06
−
|  The relational operators and
+
|  the relational operators and
  
 
|-
 
|-
 
| 09:08
 
| 09:08
−
|  how to use '''relational operators''' to '''compare'''  data
+
|  how to use '''relational operators''' to compare data.
  
 
|-
 
|-
 
|  09:13
 
|  09:13
−
|  As an assignment for this tutorial, find out if the two expressions shown are equivalent?
+
|  As an assignment for this tutorial, find out if the two expressions shown are equivalent.
  
 
|-
 
|-
 
|  09:23
 
|  09:23
−
|  To know more about the '''Spoken Tutorial''' project,  
+
|  To know more about the Spoken Tutorial project,  
−
 
+
  
 
|-
 
|-
 
| 09:23
 
| 09:23
−
|  * Watch the video available at[http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ]  
+
|  * Watch the video available at[http://spoken-tutorial.org/What_is_a_Spoken_Tutorial]  
  
 
|-
 
|-
 
| 09:28
 
| 09:28
−
|  * It summarises the Spoken Tutorial project
+
|  * It summarizes the Spoken Tutorial project
  
 
|-
 
|-
 
| 09:31
 
| 09:31
−
|  * If you do not have good bandwidth, you can download and watch it
+
|  * If you do not have good bandwidth, you can download and watch it.
  
 
|-
 
|-
 
|    09:36
 
|    09:36
−
|  The Spoken Tutorial Project Team,
+
|  The Spoken Tutorial Project Team:
−
 
+
  
 
|-
 
|-
 
| 09:38
 
| 09:38
−
|  Conducts workshops using '''spoken tutorials'''.
+
|  Conducts workshops using 'Spoken Tutorials'.
−
 
+
  
 
|-
 
|-
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|-
 
|-
 
|  09: 50
 
|  09: 50
−
| '''Spoken Tutorial '''Project is a part of the '''Talk to a Teacher''' project.
+
| Spoken Tutorial Project is a part of the 'Talk to a Teacher' project.
−
 
+
  
 
|-
 
|-
 
| 09:54
 
| 09:54
−
|  It is supported by the '''National Mission on Education through ICT, MHRD, Government of India. '''
+
|  It is supported by the National Mission on Education through ICT, MHRD, Government of India.  
−
 
+
  
 
|-
 
|-
 
| 10:00
 
| 10:00
−
|  More information on this Mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''
+
|  More information on this mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''.
  
 
|-
 
|-
 
| 10:05
 
| 10:05
 
|  This tutorial has been contributed by '''TalentSprint'''. Thanks for joining.
 
|  This tutorial has been contributed by '''TalentSprint'''. Thanks for joining.
−
 
−
 
−
 
  
 
|}
 
|}

Revision as of 21:42, 22 March 2015

Time Narration
00:01 Welcome to the spoken tutorial on Relational Operators in Java.
00:07 In this tutorial, we will learn about the
00:09 boolean data type
00:10 Relational operators and
00:12 how to compare data using Relational operators.
00:17 For this tutorial, we are using

Ubuntu 11.10,

JDK 1.6 and

Eclipse 3.7

00:26 To follow this tutorial, you must have knowledge of data types in Java.
00:31 If not, for relevant tutorials, please visit our website as shown.
00:39 Relational operators are used to check for conditions.
00:43 Their output is a variable of boolean data type
00:48 A boolean data type is of size 1 bit.
00:51 It stores only two values.
00:54 True or False.
00:56 True is the output when the condition is true.
00:59 False is the output if the condition is not true.
01:06 Here is a list of the Relational operators available.
01:10 * greater than
01:12 * less than
01:13 * equal to
00:14 * greater than or equal to
01:15 * less than or equal to
01:17 * not equal to
01:19 We shall look into each of them in detail.
01:22 Switch to Eclipse.
01:27 Here we have the Eclipse IDE and the skeleton required for the rest of the code.
01:33 I have created a class BooleanDemo and added the Main method.
01:38 Now let us add some expressions.
01:41 Type boolean b ;
01:47 The keyword boolean declares the data type of the variable b as boolean.
01:53 We shall store the result of our condition in b.
01:58 We shall define a variable weight and check for a condition using that variable.
02:05 int weight equal to 45;
02:13 We shall check if the value in weight is greater than 40.
02:18 b equal to weight greater than 40;
02:28 This statement says check if the value of variable is greater than 40 and store the result in 'b';
02:37 Now Let us print the value of 'b'.
02:41 System dot out dot println(b);
02:49 Save and Run.
02:59 As we can see, the output is True.
03:02 Let us see what happens if the value is less than 40.
03:07 Change weight to 30.
03:12 Save and run.
03:20 We can see that the output is False as expected.
03:24 This way, the greater than symbol is used to check if one value is greater than the other.
03:30 Similarly, less than symbol is used to check if one value is less than the other.
03:37 let us change thegreater than to less than symbol.
03:43 So, We are checking if the value of weight is less than 40.
03:48 Save, Run.
03:56 As we can see, the output is True as expected.
04:01 Let us change the value of weight to 45 and see the output.
04:09 Save and Run.
04:16 We see that we get a False because the condition,
04:21 weight less than 40 is not true.
04:25 Now let us see how to check if a value is equal to another.
04:31 To do that, we use two equal to symbols.
04:35 Change less than symbol to double equal to.
04:41 Save and Run.
04:48 As we can see, the output is False because the value of weight is not equal to 40.
04:55 Now let us change the weight to 40 and see the output.
05:01 Save and Run.
05:08 As we can see, the output is True.
05:12 This way, double equal to is used for checking equality.
05:16 Please be careful because, often people use a single equal to symbol for checking equality.
05:22 And this gives unnecessary errors.
05:26 Next we'll see how to check for less than or equal to.
05:30 To do that, we will use a less than symbol followed by an equal to symbol.
05:35 Change the double equal to, to less than equal to.
05:42 Save and Run.
05:50 The output is True as expected.
05:53 Now let us change the value of weight to see if the less than check is performed.
05:59 Change 40 to 30.
06:04 Save and Run.
06:14 We see, that although the weight is not equal to 40 we get the output as True because it is less than 40.
06:22 Let us see what happens if the value of weight is greater than 40.
06:27 Let's say 50. Save and Run.
06:39 As we can see, the output is False because the value of weight is not equal to 40.
06:44 And it also not less than 40.
06:48 Similarly, we use a greater than symbol followed by an equal to symbol for checking greater than or equal to.
06:55 Let us try it.
06:57 Change less than equal to to greater than equal to.
07:04 Save and Run.
07:10 As we can see, the output is true because weight is greater than 40
07: 16 Let us change weight to a value less than 40. Let's say 30.
07:25 Save and Run.
07:32 We get a false because the value of weight is not greater than 40 and also not equal to 40.
07:39 Next, we’ll see how to check for not equal to.
07:46 It is done by using an exclamation mark followed by an equal to symbol.
07:53 Change greater than to exclamation .
07:59 So this statement says check if the value of weight is not equal to 40 and store the result in b.
08:08 Save and Run.
08:16 As we can see, the output is true because the values of weight is not equal to 40.
08:23 Let us change the weight to 40 and see the output.
08:28 Change 30 to 40.
08:31 Save, Run.
08:38 We get a false because the condition weight not equal to 40 is false.
08:45 The not equal to condition can be thought of as opposite of equal to condition.
08:50 This is how we use the various relational operators to compare data in Java.
08:58 This brings us to the end of this tutorial.
09:01 In this tutorial we have learnt about: the boolean data type
09:06 the relational operators and
09:08 how to use relational operators to compare data.
09:13 As an assignment for this tutorial, find out if the two expressions shown are equivalent.
09:23 To know more about the Spoken Tutorial project,
09:23 * Watch the video available at[1]
09:28 * It summarizes the Spoken Tutorial project
09:31 * If you do not have good bandwidth, you can download and watch it.
09:36 The Spoken Tutorial Project Team:
09:38 Conducts workshops using 'Spoken Tutorials'.
09:40 Gives certificates for those who pass an online test. For more details, please write to contact AT spoken HYPHEN tutorial DOT org.
09: 50 Spoken Tutorial Project is a part of the 'Talk to a Teacher' project.
09:54 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
10:00 More information on this mission is available at spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro.
10:05 This tutorial has been contributed by TalentSprint. Thanks for joining.

Contributors and Content Editors

Gaurav, PoojaMoolya, Ranjana, Sandhya.np14, Sneha

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