Ruby/C2/Logical-and-other-Operators/Kannada
From Script | Spoken-Tutorial
Revision as of 18:07, 16 December 2015 by Sandhya.np14 (Talk | contribs)
Time | Narration |
00:02 | Logical & Other Operators ಎಂಬ Spoken Tutorialಗೆ ನಿಮಗೆ ಸ್ವಾಗತ. |
00:06 | ಈ ಟ್ಯುಟೋರಿಯಲ್ ನಲ್ಲಿ ನಾವು: |
00:09 | * Logical Operators |
00:11 | *Parallel assignment and |
00:13 | * Range Operators ಇವುಗಳನ್ನು ಕಲಿಯುವೆವು. |
00:15 | ಇಲ್ಲಿ ನಾವು: |
00:17 | * Ubuntu Linux ಆವೃತ್ತಿ 12.04 |
00:20 | * Ruby 1.9.3ಇವುಗಳನ್ನು ಬಳಸುತ್ತಿದ್ದೇವೆ. |
00:23 | ಈ ಟ್ಯುಟೋರಿಯಲ್ ಅನ್ನು ಅನುಸರಿಸಲು, 'Linux' ನಲ್ಲಿ ‘ಟರ್ಮಿನಲ್’ ಮತ್ತು ‘ಟೆಕ್ಸ್ಟ್ ಎಡಿಟರ್’ಗಳನ್ನು ಉಪಯೋಗಿಸುವುದನ್ನು ನೀವು ತಿಳಿದಿರಬೇಕು. |
00:29 | You must also be familiar with irb. |
00:33 | If not, for relevant tutorials, please visit our website. |
00:38 | Logical operators are also known as Boolean operators |
00:42 | because they evaluate parts of an expression |
00:45 | and return a true or false value. |
00:48 | Logical Operators are- |
00:51 | * double ampersand (&&) that is (and) |
00:54 | * double pipe that is (or) |
00:56 | * Exclamation (!) that is (not) |
01:00 | * '&&' (double ampersand) and and evaluate to true only if both the expressions are true. |
01:07 | Second expression is evaluated only if the first is true. |
01:12 | Difference in the two forms is precedence. |
01:15 | Symbolic and that is&&(double ampersand) has higher precedence. |
01:20 | Let's see some examples now. |
01:22 | We will use irb for this. |
01:25 | Open the terminal by pressing Ctrl, Alt and T keys simultaneously. |
01:31 | Type "irb" and press Enter to launch interactive Ruby. |
01:36 | Type: 3 greater than 2 space double ampersand space 4 less than 5. |
01:47 | Press Enter. |
01:49 | We get the output as true. |
01:53 | Here, expression1 that is 3>2 is true. |
01:59 | Expression 2 that is 4<5 is also true. |
02:03 | Since both the expressions are true, we get output as true. |
02:08 | Now, press Up-Arrow key to get the previous command. |
02:12 | And replace the double ampersand symbol with the word "and". |
02:17 | Press Enter. |
02:19 | We get the same result. |
02:22 | Now, press up-arrow key again to get the previous command. |
02:27 | In expression1, replace greater-than sign with less-than, |
02:32 | press Enter |
02:35 | We get the output as false. |
02:38 | This is because 3 < 2 is false. |
02:43 | Since the first expression is false, the second expression will not be evaluated. |
02:49 | So, we get output as false. |
02:53 | double pipe and or evaluate to true, if either expression is true. |
02:59 | Second expression is evaluated only if first is false. |
03:04 | Difference in the two forms is precedence. |
03:07 | Symbolic or i.e double pipe has higher precedence. |
03:11 | Now, let's try some examples. |
03:15 | Type: 10 greater than 6 space double pipe space 12 less than 7 |
03:23 | Press Enter. |
03:26 | We get output as true. |
03:29 | Here expression 1, that is 10>6, is true. |
03:35 | Since the first expression is true, second expression will not be evaluated. |
03:40 | So, we get the output as true. |
03:42 | Now, press the Up-Arrow key to get the previous command. |
03:46 | In expression 1 replace greater than sign with less than sign |
03:52 | and replace pipe symbol with the word or. |
03:57 | Press Enter. |
04:00 | Here, expression1 that is 10<6 is false. |
04:05 | Expression 2 that is 12<7 is also false. |
04:10 | Since both the expressions are false, we get output as false. |
04:15 | ! (exclamation mark ) and not operators return the opposite value of the expression. |
04:20 | If the expression is true, exclamation mark operator will return a false value. |
04:27 | It will return true if the expression is false. |
04:30 | Difference in the two forms is precedence. |
04:33 | Symbolic "not", that is (!), has higher precedence. |
04:37 | Let's try out the "not" operator. |
04:40 | First, type: 10 double equal to 10 |
04:45 | Press Enter . |
04:47 | We get the output as true. |
04:50 | To invert the result of above expression, |
04:53 | let's add the "not" operator before the expression. |
04:57 | Type: exclamation mark within brackets 10 double equal to 10 . |
05:04 | Press Enter. |
05:06 | We get the output as false. |
05:10 | Press Ctrl+L simultaneously to clear the irb console. |
05:15 | Next, let us learn about parallel assignment. |
05:20 | Multiple variables can be initialized with a single line of Ruby code, through parallel assignment. |
05:26 | Let's switch to the terminal. |
05:29 | Let's declare three variables a, b, c using parallel assignment. |
05:36 | Type: a comma b comma c equal to 10 comma 20 comma 30 |
05:45 | and press Enter. |
05:47 | Here, 10 will be assigned to variable 'a', |
05:52 | 20 will be assigned to variable 'b' |
05:54 | 30 will be assigned to variable 'c'. |
05:56 | The right-hand side acts as an array. |
06:01 | If we list multiple variables on the left hand side then the array is unpacked and assigned into the respective variables. |
06:10 | We will learn about arrays in detail in the upcoming tutorials. |
06:14 | For now, let's check whether the assignment is done properly. |
06:20 | Type 'a' and press Enter. |
06:23 | Value 10, stored in variable 'a', is displayed. |
06:28 | Type 'b' and press Enter. |
06:31 | We get 20. |
06:33 | Type 'c' and press Enter. |
06:37 | 30 is displayed. |
06:40 | Parallel assignment is also useful for swapping the values stored in two variables. |
06:45 | Let us swap the values of variables 'a' and 'b'. |
06:50 | Type puts space within double quotes a equal to hash within curly brackets a comma within double quotes b equal to hash within curly brackets b |
07:11 | Press Enter. |
07:13 | We get the output as a=10 |
07:16 | b=20. |
07:20 | Now, let's swap 'a' and 'b'. |
07:23 | To do so, type: |
07:25 | a comma b equal to b comma a |
07:31 | Press Enter. |
07:33 | Press Up-Arrow key twice to get the puts command and press Enter. |
07:39 | We get the output as- |
07:41 | a=20 |
07:44 | b=10 . |
07:47 | We will now learn about range in Ruby. |
07:50 | The values in a range can be numbers, characters, strings or objects. |
07:58 | Ranges are used to express a sequence. |
08:02 | Sequence range is used to create a range of successive values. |
08:06 | It consists of a start value, range of values and an end value. |
08:13 | (..) two dot operator creates inclusive range. |
08:16 | (...) three dot operator creates an exclusive range. |
08:20 | Ranges are used to identify whether a value falls within a particular range, too. |
08:26 | We do this using (===) the equality operator. |
08:30 | Let us try out some examples on ranges. |
08:33 | Let's switch to terminal. |
08:36 | Type: within brackets 1 two dots 10 then dot to underscore a |
08:46 | Two dot operator creates inclusive range. |
08:50 | Inclusive operator includes both begin and end values in a range. |
08:57 | Here to_a method is used to convert a range to a list. |
09:03 | Press Enter. |
09:05 | Here you can see the values 1 and 10 are included in the range. |
09:11 | Now we will see an exclusive range operator. |
09:16 | Type: within brackets 1 three dots 10 then dot to underscore a. |
09:27 | Three dot operator creates an exclusive range. |
09:31 | Exclusive range operator excludes the end value from the sequence. |
09:37 | Press Enter. |
09:39 | Here, the end value 10 is not included in the range. |
09:45 | Now let's check whether 5 lies in the range of 1 to 10. |
09:50 | Type: within brackets 1 two dots 10 three times equal to and then 5. |
10:00 | Press Enter. |
10:02 | Equality operator is used to check whether a value lies in the range. |
10:07 | We get the output as true since 5 lies in the range 1 to 10. |
10:14 | This brings us to the end of this Spoken Tutorial. |
10:17 | In this tutorial, we have learnt: |
10:20 | Logical operator i.e double ampersand, double pipe and exclamation mark operators. |
10:27 | Parallel assignment Ex: a, b, c = 10, 20, 30 |
10:34 | Range Operator Inclusive operator (..) and Exclusive operator(...). |
10:39 | As an assignment, |
10:41 | declare two variables using parallel assignment and |
10:45 | check whether their sum lies between 20 and 50. |
10:49 | ಈ ಕೆಳಗಿನ ಲಿಂಕ್ ನಲ್ಲಿ ಲಭ್ಯವಿರುವ ವೀಡಿಯೋವನ್ನು ವೀಕ್ಷಿಸಿ. |
10:52 | ಇದು “ಸ್ಪೋಕನ್ ಟ್ಯುಟೋರಿಯಲ್” ಪ್ರಕಲ್ಪದ ಸಾರಾಂಶವಾಗಿದೆ. |
10:56 | ನಿಮಗೆ ಒಳ್ಳೆಯ ‘ಬ್ಯಾಂಡ್ವಿಡ್ತ್’ ಸಿಗದಿದ್ದರೆ, ನೀವು ಇದನ್ನು ಡೌನ್ಲೋಡ್ ಮಾಡಿ ನೋಡಬಹುದು. |
11:00 | “ಸ್ಪೋಕನ್ ಟ್ಯುಟೋರಿಯಲ್” ಪ್ರಕಲ್ಪದ ತಂಡವು: |
11:03 | * ‘ಸ್ಪೋಕನ್ ಟ್ಯುಟೋರಿಯಲ್’ಗಳನ್ನು ಬಳಸಿ ಕಾರ್ಯಶಾಲೆಗಳನ್ನು ನಡೆಸುತ್ತದೆ. |
11:05 | * ಆನ್-ಲೈನ್ ಪರೀಕ್ಷೆಯಲ್ಲಿ ಉತ್ತೀರ್ಣರಾದವರಿಗೆ ಪ್ರಮಾಣಪತ್ರವನ್ನು ಕೊಡುತ್ತದೆ. |
11:09 | ಹೆಚ್ಚಿನ ಮಾಹಿತಿಗಾಗಿ, ದಯವಿಟ್ಟು ಈ ಲಿಂಕ್ ಗೆ ಬರೆಯಿರಿ.
contact@spoken-tutorial.org |
11:15 | "ಸ್ಪೋಕನ್ ಟ್ಯುಟೋರಿಯಲ್" ಪ್ರಕಲ್ಪವು "ಟಾಕ್ ಟು ಎ ಟೀಚರ್" ಪ್ರಕಲ್ಪದ ಒಂದು ಭಾಗವಾಗಿದೆ. |
11:19 | ಇದು ICT, MHRD ಮೂಲಕ ರಾಷ್ಟ್ರೀಯ ಸಾಕ್ಷರತಾ ಮಿಷನ್, ಭಾರತ ಸರ್ಕಾರದ ಆಧಾರವನ್ನು ಪಡೆದಿದೆ. |
11:25 | ಈ ಮಿಷನ್ ನ ಬಗ್ಗೆ ಹೆಚ್ಚಿನ ಮಾಹಿತಿಯು ಈ ಕೆಳಗಿನ ಲಿಂಕ್ ನಲ್ಲಿ ಲಭ್ಯವಿರುತ್ತದೆ:
spoken hyphen tutorial dot org slash NMEICT hyphen Intro. |
11:34 | ಈ ಸ್ಕ್ರಿಪ್ಟ್, "IIT Bombay- ಸ್ಪೋಕನ್ ಟ್ಯುಟೋರಿಯಲ್ ತಂಡ" ಇವರ ಕೊಡುಗೆಯಾಗಿದೆ. |
11:38 | IIT Bombay ಯಿಂದ, ಸ್ಕ್ರಿಪ್ಟ್ ನ ಅನುವಾದಕಿ ಸಂಧ್ಯಾ ಪುಣೇಕರ್ ಹಾಗೂ ಪ್ರವಾಚಕ ----------- . ವಂದನೆಗಳು. |