Java/C2/Arithmetic-Operations/English-timed
From Script | Spoken-Tutorial
Time' | Narration
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00:01 | Welcome to the tutorial on Arithmetic Operations in Java. | ||
00:06 | 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.
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00:33 | If not, for relevant tutorial please visit our website as shown. | ||
00:43 | Here is a list of operators and the mathematical operations they perform
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00:55 | 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.
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01:11 | We have created a class by name Arithmetic Operations and added the main method.
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01:17 | Let us add some variables. | ||
01:22 | int x = 5; | ||
01:27 | 'int y = 10; print result
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01:35 | x and y will be the operands and the result will store the output of operations. | ||
01:42 | Let us add them and print the result. Result= x+y; system. out. println 'in parantesis result
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02:10 | Save it with Control S and control F11 to Run
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02:17 | We see, that the output of addition is stored and the value has been printed | ||
02:25 | Now Let us change the values . x=75,y = 15
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02:38 | Save it Run | ||
02:43 | we see that the output has changed accordingly | ||
02:48 | Now let us try negative values. 'y = -25.
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02:57 | Save Run. | ||
03:02 | we see that the output of 75 plus -25 has been printed | ||
03:11 | Now let us try subtraction. 'y = 5 and change x+y to x-y
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03:25 | Save it Run. | ||
03:32 | we see that the output of 75-5 has been printed, | ||
03:39 | Now Let us try multiplication. Change minus to asterisk
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03:47 | Save Run. | ||
03:52 | we see that by using asterisk we could multiply 75*5. . | ||
03:59 | Now let us try division Remove asterisk and type slash | ||
04:08 | Save it Run. | ||
04:14 | 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.
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04:24 | Change 5 to 10
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04:28 | The result must be 7.5. | ||
04:30 | So let us change the result to a float.
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04:43 | Save it Run.
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04:51 | 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. | ||
05:02 | Let us change y to a float. y=10f | ||
05:16 | Save Run.
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05:22 | Now we can see that the result is as expected.
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05:25
Keep in mind that when the expected result is a float, one of the operands must be a float to get the expected output. | |||
05:33 | 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
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06:09 | As we can see, the output is as expected. | ||
06:13 | Now Change minus to a s lash
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06:20 | Now the output would be 6 if the addition is done before division.
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06:25 | Or it would be 10 if division is done before addition.
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06:30 | Let us Run and see the output.
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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.
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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.
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07:10 | Let us run the file now.
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07:16 | As we can see, addition has been performed first and the output is 6 as expected.
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07:23 | As a rule, keep in mind to use parentheses when the order of operations is not clear. | ||
07:37 | 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, | ||
07:46 | 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.
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08:39 | This tutorial has been contributed by TalentSprint. Thanks for joining.
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Contributors and Content Editors
Arya Ratish, Gaurav, Krupali, PoojaMoolya, Priyacst, Sandhya.np14, Sneha