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

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Line 141: Line 141:
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Change '''y = 15 '''to '''y = -25.'''
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Change '''y = 15 '''to '''y = -25.'''
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| Now let us try negative values.
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| Now let us try negative values. '''y = -25.''
  
−
So type -25 in place of 15
+
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Save''' and '''Run'''.  
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Save''' and '''Run'''.  
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Save''' and '''Run.'''
+
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Save''' '''Run.'''
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to output
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to output
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| As we can see, the effect is same as subtracting '''y''' from '''x'''.
+
| style="border:0.035cm solid #000000;padding:0.176cm;"|   we   see that the output  of  75  plus of -25 has been printed
−
 
+
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''y = -25''' to '''y = 5''' and '''x + y '''to '''x – y'''
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''y = -25''' to '''y = 5''' and '''x + y '''to '''x – y'''
Line 158: Line 157:
  
  
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now let us try subtraction.
+
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now let us try subtraction. '''y = 5'' and change x+y to x-y
−
 
+
  
−
So type 5 in place of -25
 
  
−
And '''minus''' in place of '''plus'''
 
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run'''.  
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run'''.  
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save '''and '''Run.'''
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save it ''' '''Run.'''
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to output
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to output
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| As we can see, we can perform subtraction using the '''minus''' operator.
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| we   see that the output of 75-5 has been printed,
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''x – y '''to '''x * y'''
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''x – y '''to '''x * y'''
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| Let us try the multiplication.
+
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now Let us try the multiplication. Change '''minus''' to ''' asterisk'''
  
−
So type asterisk in place of minus.
+
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' '''Run.'''
  
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to output  
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to output  
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| As we can see, the asterisk symbol is used to perform multiplication.
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| we see that  by using  asterisk we could  multiply 75*5. .  
−
 
+
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''x * y''' to '''x / y'''
 
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''x * y''' to '''x / y'''
Line 192: Line 187:
  
  
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| So type front slash in place of asterisk.
+
| style="border:0.035cm solid #000000;padding:0.097cm;"|Now let us try '''division''' Remove  asteriskand type slash
−
 
+
  
 
The front slash symbol is used to perform division.
 
The front slash symbol is used to perform division.
Line 199: Line 193:
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save it''' '''Run.'''
  
 
|-
 
|-
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The result must be 7.5.
 
The result must be 7.5.
  
−
So let us change the result to float.
+
So let us change the result to a  float.
  
  
  
  
 +
 
|-
 
|-
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| Change '''int result''' to '''float result'''
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save it''' '''Run'''.  
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| Change '''int''' to '''float'''
+
−
 
+
−
|-
+
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run'''.  
+
  
 
Point to output.
 
Point to output.
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| Note that although the expected result is 7.5, we get the output as 7.0
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| Note that although the expected result is 7.5, we get output as 7.0
  
 
|-
 
|-
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|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Change '''y = 10''' to '''y = 10f'''
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| Change '''y = 10''' to '''y = 10f'''
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| Let us change y to a float.
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| Let us change y to a float. y=10f
−
 
+
−
 
+
−
Add an '''f''' at the end.
+
  
 +
 
 
|-
 
|-
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.''' Point to output.
 
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.''' Point to output.
−
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save''' and '''Run.'''
+
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Save'''   '''Run.'''
  
  
Line 261: Line 250:
  
  
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now let us see what happens when there is more than one operator.
+
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now let us see what happens when there is more than one operator.Remove all the operands
  
 
|-
 
|-
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Point to output
 
Point to output
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| The result we would expect is 10.
+
| style="border:0.035cm solid #000000;padding:0.097cm;"|int result= 8+4-2. Save it run
−
 
+
−
 
+
−
Let us '''Save''' and '''Run'''
+
−
 
+
  
 
As we can see, the output is as expected.
 
As we can see, the output is as expected.
Line 284: Line 270:
  
 
Point to output
 
Point to output
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''minus''' to '''front slash'''
+
| style="border:0.035cm solid #000000;padding:0.097cm;"|Now  Change '''minus''' to a ''' s lash'''
  
  
−
Now the output could be 6 if the addition is done before the division.
+
Now the output would be 6 if the addition is done before division.
  
  
−
And 10 if division is done before addition.
+
Or it would be 10 if division is done before addition.
  
  
Line 296: Line 282:
  
  
−
As we can see, the division is done before addition. This is because the division operator has more precedence than the addition operator.
+
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.
  
  
Line 309: Line 295:
  
 
Point to output
 
Point to output
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| Add parentheses around '''8 + 4'''
+
| style="border:0.035cm solid #000000;padding:0.097cm;"|
−
 
+
  
 
By adding parentheses, we instruct Java to do the addition before the division.
 
By adding parentheses, we instruct Java to do the addition before the division.
  
  
−
Let us run the file.
+
Let us run the file now.
  
  
−
As we can see, 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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'''Summary'''
 
'''Summary'''
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| We have come to the end of this tutorial.  
+
| style="border:0.035cm solid #000000;padding:0.097cm;"| This brings us  to the end of this tutorial.  
  
 
In this tutorial we have learnt  
 
In this tutorial we have learnt  
Line 345: Line 330:
  
  
−
| style="border:0.035cm solid #000000;padding:0.097cm;"| Find out what is meant by the '''modulo''' operator and what it does.
+
| style="border:0.035cm solid #000000;padding:0.097cm;"|As an assignment for this tutorial  Find out what is meant by the '''modulo''' operator and what it does.
  
 
|-
 
|-

Latest revision as of 11:06, 8 May 2013

Title of script: Arithmetic Operations in Java

Author: TalentSprint

Keywords: datatype, int, float, numerical data, arithmetic operations, operator precedence, video tutorial


Visual Cue Narration
Slide 1

Welcome

Welcome to the spoken tutorial on Arithmetic Operations in Java.
Slide 2

Learning Outcomes

In this tutorial, you will learn about the various Arithmetic Operations namely

Addition

Subtraction

Multiplication

Division and

How to use them.

Slide 3

Tools Used

For this tutorial we are using

Ubuntu 11.10,

JDK 1.6 and

Eclipse 3.7.

Slide 4

Prerequisites

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


If not, for relevant tutorial please visit our website as shown.

Slide 5

Operators

Here is a list of operators and the mathematical operations they perform


  • plus symbol for addition
  • minus for subtraction
  • asterisk for multiplication
  • front slash for division

We shall look at each of them in detail.

Minimize Slides and open Eclipse

Eclipse should contain the following code

public class ArithmeticOperations{

public static void main(String[] args){

}

}

Here We have Eclipse IDE and the skeleton required for the rest of the code.


We have created a class by name ArithmeticOperations and added the main method.


Let us add some variables.

Type in main method

int x = 5;

int y = 10;

int result;

int x = 5;

'int y = 10; print result


x and y will be the operands and the result will store the output of operations.

Type in main method

result = x + y;

System.out.println(result);

Let us add them and print the result. Result= x+y; system. out. println 'in parantesis result



Save and Run. 'Save it with ControlS and contron F11 to Run


Point to output. We see, that the output of addition is stored and the value has been printed
Change x = 5 to x = 75 and y = 10 to y = 15 Now Let us change the values .

x=75,y = 15


Save and Run. Save it Run
Point to output we see the output has been changes accordingly
Change y = 15 to y = -25. Now let us try negative values. 'y = -25.


Save and Run. Save Run.
Point to output we see that the output of 75 plus of -25 has been printed
Change y = -25 to y = 5 and x + y to x – y


Now let us try subtraction. 'y = 5 and change x+y to x-y


Save and Run. Save it Run.
Point to output we see that the output of 75-5 has been printed,
Change x – y to x * y Now Let us try the multiplication. Change minus to asterisk


Save and Run. Save Run.
Point to output we see that by using asterisk we could multiply 75*5. .
Change x * y to x / y


Now let us try division Remove asteriskand type slash

The front slash symbol is used to perform division.

Save and Run. Save it Run.
Point to output As we can see, the output is as expected.
Change y = 5 to y = 10


Now let us see what happens when the expected result is a decimal point number.


Change 5 to 10


The result must be 7.5.

So let us change the result to a float.



Save it Run.

Point to output.

Note that although the expected result is 7.5, we get output as 7.0
Point to the operands. This is because both the operands involved in the division are integers.
Change y = 10 to y = 10f Let us change y to a float. y=10f


Save and Run. Point to output. Save Run.


Now we can see that the result is as expected.


Keep in mind that when the expected result is a float, one of the operands must be a float to get the expected output.

Remove everything inside the main function, except the print line and add the following, before

Int result = 8 + 4 – 2;


Now let us see what happens when there is more than one operator.Remove all the operands
Save and Run.


Point to output

int result= 8+4-2. Save it run


As we can see, the output is as expected.

Change 8 + 4 – 2 to 8 + 4 / 2


Save and Run.


Point to output

Now Change minus to a s lash


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


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


Let us Run and see the output.


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.


In such situations, if we need to override the precedence, we use parentheses.

Change 8 + 4 / 2 to (8 + 4) / 2


Save and Run.


Point to output

By adding parentheses, we instruct Java to do the addition before the division.


Let us run the file now.


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


As a rule, keep in mind to use parentheses when the order of operations is not clear.

Minimize the Eclipse window and switch to slides.


Slide 6

Summary

This brings us to the end of this tutorial.

In this tutorial we have learnt

How to perform basic mathematical operations in Java.

About operator precedence, and,

How to override it.

Slide 7Assignment


As an assignment for this tutorial Find out what is meant by the modulo operator and what it does.
Slide 8About the Spoken Tutorial Project
  • It summarizes the Spoken Tutorial project
  • If you do not have good bandwidth, you can download and watch it


To know more about the Spoken Tutorial project, watch the video available at the following link, that summarizes the project.Alternatively, you can download and watch it.
Slide 9Spoken Tutorial WorkshopsThe Spoken Tutorial Project Team
  • Conducts workshops using spoken tutorials
  • Gives certificates for those who pass an online test


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.
Slide 10Acknowledgement
  • 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


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
Slide 11About the contributor
  • This tutorial has been contributed by TalentSprint
  • www.talentsprint.com
  • Thanks for joining


This tutorial has been contributed by TalentSprint. Thanks for joining.



Contributors and Content Editors

Chandrika, Sneha

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