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

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| In this tutorial, you will learn about the various  '''Arithmetic Operations ''' namely
 
| In this tutorial, you will learn about the various  '''Arithmetic Operations ''' namely
 
'''Addition'''
 
'''Addition'''
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'''Eclipse 3.7'''.
 
'''Eclipse 3.7'''.
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| If not, for relevant tutorial please visit our website as shown.
 
| If not, for relevant tutorial please visit our website as shown.
  
 
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|  Here is a list of operators and the mathematical operations they perform
 
|  Here is a list of operators and the mathematical operations they perform
  
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| We shall look at each of them in detail.
 
| We shall look at each of them in detail.
  
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| We have created a class by name '''Arithmetic Operations''' and added the '''main '''method.
 
| We have created a class by name '''Arithmetic Operations''' and added the '''main '''method.
  
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| '''int y = 10;''  
 
| '''int y = 10;''  
 
int result
 
int result
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|  Let us add them and print the result.''' Result= x+y;''' system. out. println ''''in parantesis '''result''
 
|  Let us add them and print the result.''' Result= x+y;''' system. out. println ''''in parantesis '''result''
 
   
 
   
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|  Save it with ''Control S'' and ''control F11'' to''' Run'''
 
|  Save it with ''Control S'' and ''control F11'' to''' Run'''
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|  Now Let us change the values  . '''x=75''','''y = 15'''
 
|  Now Let us change the values  . '''x=75''','''y = 15'''
  
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| '''Save''' it '''Run'''
 
| '''Save''' it '''Run'''
  
 
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|-
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|  we  see that the output has    changed  accordingly
 
|  we  see that the output has    changed  accordingly
  
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|  02:48
 
| Now let us try negative values. '''y = -25.''
 
| Now let us try negative values. '''y = -25.''
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| 03:02
 
| 03:02
 
|  we  see  that the output  of  75  plus  -25 has been printed
 
|  we  see  that the output  of  75  plus  -25 has been printed
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|  Now let us try subtraction. '''y = 5'' and change x+y to x-y
 
|  Now let us try subtraction. '''y = 5'' and change x+y to x-y
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| | Now Let us try  multiplication. Change '''minus''' to ''' asterisk'''
 
| | Now Let us try  multiplication. Change '''minus''' to ''' asterisk'''
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|  '''Save''' and '''Run.'''
 
|  '''Save''' and '''Run.'''
  
 
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|  03:52
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|  we  see that  by using  asterisk we could  multiply 75*5. .  
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|  we  see that  by using  asterisk we could  multiply 75 by 5. .  
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|  Now let us try '''division''' Remove  asterisk and type slash
 
|  Now let us try '''division''' Remove  asterisk and type slash
 
   
 
   
 
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|  '''Save it'''  '''Run.'''
 
|  '''Save it'''  '''Run.'''
  
 
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| As we can see, the output is as expected.
 
| As we can see, the output is as expected.
  
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| 04:18
 
| Now let us see what happens when the expected result is a decimal point number.
 
| Now let us see what happens when the expected result is a decimal point number.
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| Change '''5''' to '''10'''
 
| Change '''5''' to '''10'''
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| So let us change the result to a  float.
 
| So let us change the result to a  float.
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|  '''Save it'''  '''Run'''.  
 
|  '''Save it'''  '''Run'''.  
  
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|  Note that although the expected result is 7.5, we get  output as 7.0
 
|  Note that although the expected result is 7.5, we get  output as 7.0
  
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| | Let us change y to a float. y=10f
 
| | Let us change y to a float. y=10f
 
   
 
   
 
|-
 
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|  '''Save  '''  '''Run'''.  
 
|  '''Save  '''  '''Run'''.  
 
   
 
   
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|Now we can see that the result is as expected.
 
|Now we can see that the result is as expected.
  
  
 
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|05:24
 
|Keep in mind that when the expected result is a float, one of the operands must be a float to get the expected output.
 
|Keep in mind that when the expected result is a float, one of the operands must be a float to get the expected output.
  
 
|-
 
|-
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|  Now let us see what happens when there is more than one operator.Remove all the operands
 
|  Now let us see what happens when there is more than one operator.Remove all the operands
  
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|  int result= 8+4-2. ''Save it ,run''
 
|  int result= 8+4-2. ''Save it ,run''
 
   
 
   
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|-
 
|06:09
 
|06:09
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| |Now  Change '''minus''' to a '''  s lash'''
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| |Now  Change '''minus''' to a '''  slash'''
  
  
 
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|Now the output would be 6 if the addition is done before  division.
 
|Now the output would be 6 if the addition is done before  division.
  
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| As we can see,  addition has been performed first and the output is 6 as expected.
 
| As we can see,  addition has been performed first and the output is 6 as expected.
  
  
 
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| As a rule, keep in mind to use parentheses when the order of operations is not clear.
 
| As a rule, keep in mind to use parentheses when the order of operations is not clear.
  
 
|-
 
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|  This brings us  to the end of this tutorial.  
 
|  This brings us  to the end of this tutorial.  
  
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| '''How to override it.'''
 
| '''How to override it.'''
  
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|  07:49
 
| As an assignment for this tutorial  Find out what is meant by the '''modulo''' operator and what it does.
 
| As an assignment for this tutorial  Find out what is meant by the '''modulo''' operator and what it does.
−
 
−
 
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|-
 
|-
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|  07:58
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| To know more about the '''Spoken Tutorial''' project, watch the video available at the following link,
 
| To know more about the '''Spoken Tutorial''' project, watch the video available at the following link,
 
|-
 
|-
−
|  08:03
+
|  08:02
 
|  It  summarizes the project.  
 
|  It  summarizes the project.  
 
|-
 
|-
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|  08:06
+
|  08:05
 
| 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
 
|-
 
|-
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|  08:11
+
|  08:10
 
|  The Spoken Tutorial Team.  
 
|  The Spoken Tutorial Team.  
 
|-
 
|-
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| Conducts workshops using '''spoken tutorials'''  
 
| Conducts workshops using '''spoken tutorials'''  
 
|-
 
|-
−
|08:15 
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|08:14
 
|  Gives certificates to those who pass an online test.  
 
|  Gives certificates to those who pass an online test.  
 
|-
 
|-
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|-
 
|-
−
| 08:25 
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| 08:24
 
| The  '''Spoken Tutorial Project''' is a part of the '''Talk to a Teacher''' project .
 
| The  '''Spoken Tutorial Project''' is a part of the '''Talk to a Teacher''' project .
 
|-
 
|-

Revision as of 16:42, 13 November 2013

Time' Narration


00:01 Welcome to the tutorial on Arithmetic Operations in Java.
00:05 In this tutorial, you will learn about the various Arithmetic Operations namely

Addition

Subtraction

Multiplication

Division and

How to use them.

00:16 For this tutorial we are using

Ubuntu 11.10,

JDK 1.6 and

Eclipse 3.7.

00:24 To follow this tutorial you must have eclipse installed on your system
00:28 and you must know how to create, save and run a file in Eclipse.


00:32 If not, for relevant tutorial please visit our website as shown.
00:42 Here is a list of operators and the mathematical operations they perform


  • plus symbol for addition
  • minus for subtraction
  • asterisk for multiplication
  • and slash for division
00:54 We shall look at each of them in detail.
01:05 Here We have Eclipse IDE and the skeleton required for the rest of the code.


01:10 We have created a class by name Arithmetic Operations and added the main method.


01:17 Let us add some variables.
01:22 int x = 5;
01:26 'int y = 10;

int result


01:35 x and y will be the operands and the result will store the output of operations.
01:41 Let us add them and print the result. Result= x+y; system. out. println 'in parantesis result
02:10 Save it with Control S and control F11 to Run
02:17 We see, that the output of addition is stored and the value has been printed
02:24 Now Let us change the values . x=75,y = 15
02:37 Save it Run
02:42 we see that the output has changed accordingly
02:48 Now let us try negative values. 'y = -25.
02:57 Save Run.
03:02 we see that the output of 75 plus -25 has been printed
03:10 Now let us try subtraction. 'y = 5 and change x+y to x-y
03:25 Save it Run.
03:32 we see that the output of 75-5 has been printed,
03:38 Now Let us try multiplication. Change minus to asterisk
03:46 Save and Run.
03:52 we see that by using asterisk we could multiply 75 by 5. .
03:58 Now let us try division Remove asterisk and type slash
04:07 Save it Run.
04:13 As we can see, the output is as expected.
04:18 Now let us see what happens when the expected result is a decimal point number.
04:24 Change 5 to 10
04:28 The result must be 7.5.
04:30 So let us change the result to a float.
04:43 Save it Run.
04:50 Note that although the expected result is 7.5, we get output as 7.0
04:57 This is because both the operands involved in the division are integers.
05:01 Let us change y to a float. y=10f
05:15 Save Run.
05:21 Now we can see that the result is as expected.


05:24 Keep in mind that when the expected result is a float, one of the operands must be a float to get the expected output.
05:32 Now let us see what happens when there is more than one operator.Remove all the operands
05:48 int result= 8+4-2. Save it ,run
06:09 As we can see, the output is as expected.
06:12 Now Change minus to a slash


06:19 Now the output would be 6 if the addition is done before division.


06:25 Or it would be 10 if division is done before addition.


06:30 Let us Run and see the output.


06:38 As we can see, the output is 10 and the division is done before addition. This is because the division operator has more precedence than the addition operator.


06:50 In such situations, if we need to override the precedence, we use parentheses.
07:04 By adding parentheses, we instruct Java to do the addition before the division.


07:10 Let us run the file now.


07:15 As we can see, addition has been performed first and the output is 6 as expected.


07:22 As a rule, keep in mind to use parentheses when the order of operations is not clear.
07:36 This brings us to the end of this tutorial.
07:40 we have learnt
07:41 How to perform basic mathematical operations in Java.
07:44 operator precedence, and,
07:45 How to override it.
07:49 As an assignment for this tutorial Find out what is meant by the modulo operator and what it does.
07:57 To know more about the Spoken Tutorial project, watch the video available at the following link,
08:02 It summarizes the project.
08:05 If you do not have good bandwidth you can download and watch it
08:10 The Spoken Tutorial Team.
08:12 Conducts workshops using spoken tutorials
08:14 Gives certificates to those who pass an online test.
08:18 For more details, please write to spoken HYPHEN tutorial DOT org.
08:24 The Spoken Tutorial Project is a part of the Talk to a Teacher project .
08:29 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
08:35 More information on this Mission is available at the following link spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro
08:39 This tutorial has been contributed by TalentSprint. Thanks for joining.



Contributors and Content Editors

Arya Ratish, Gaurav, Krupali, PoojaMoolya, Priyacst, Sandhya.np14, Sneha

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