Difference between revisions of "Scilab/C2/Conditional-Branching/English-timed"
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{| border=1 | {| border=1 | ||
| − | + | |'''Time''' | |
| − | + | |'''Narration''' | |
|- | |- | ||
| − | | 00 | + | | 00:01 |
| − | | | Welcome to the spoken tutorial on Conditional Branching in Scilab. | + | | | Welcome to the spoken tutorial on '''Conditional Branching''' in '''Scilab'''. |
|- | |- | ||
| − | | 00 | + | | 00:04 |
| − | | To practice this tutorial open the | + | | To practice this tutorial, open the Scilab console window on your computer. |
|- | |- | ||
| − | |00 | + | |00:09 |
| − | | | We will discuss two types of | + | | | We will discuss two types of conditional constructs in Scilab that is the '''if-then-else''' construct and the '''select-case''' conditional construct. |
|- | |- | ||
| − | | 00 | + | | 00:19 |
| − | | | The if statement allows us to execute a group of statements if a given condition is satisfied. | + | | | The '''if statement''' allows us to execute a group of statements if a given condition is satisfied. |
|- | |- | ||
| − | | 00 | + | | 00:24 |
| | Let me give you an example: | | | Let me give you an example: | ||
| Line 35: | Line 35: | ||
|- | |- | ||
| − | | 00 | + | | 00:27 |
| − | | |n is equal 42 if n is equal to equal to 42 then disp the number is 42 | + | | |'''n is equal 42 if n is equal to equal to 42 (n==42) then disp "the number is 42" end''' of if construct. |
|- | |- | ||
| − | |00 | + | |00:37 |
| + | |||
| + | | | Here, 'is equal to'(=) is the assignment operator, which assigns 42 to the variable n, | ||
| − | |||
|- | |- | ||
| − | | 00 | + | | 00:43 |
| − | | | | + | | | and 'is equal to is equal to' (==) is the equality operator which checks for the equality between the right hand and the left hand side operands. |
|- | |- | ||
| − | | 00 | + | | 00:51 |
| − | | In this case n and 42 and gives the result in Boolean. | + | | In this case 'n' and 42 and gives the result in Boolean. |
|- | |- | ||
| − | | 00 | + | | 00:57 |
| − | | | Here the comma after the first line is optional | + | | | Here the comma after the first line is optional. |
|- | |- | ||
| − | | 01 | + | | 01:01 |
| − | | | Also the ''then'' keyword is optional. | + | | | Also the '''then''' keyword is optional. |
|- | |- | ||
| − | | 01 | + | | 01:04 |
| − | || It can be replaced by a comma or a carriage return. | + | || It can be replaced by a '''comma''' or a '''carriage return'''. |
|- | |- | ||
| − | | 01 | + | | 01:08 |
| − | || The end keyword ends the | + | || The '''end''' keyword ends the '''if''' construct. |
|- | |- | ||
| − | | 01 | + | | 01:11 |
|| On executing the script, we see the output as follows. | || On executing the script, we see the output as follows. | ||
| Line 88: | Line 89: | ||
|- | |- | ||
| − | | 01 | + | | 01:20 |
| − | | | So far we have seen how to execute a set of statements if a condition is true. | + | | | So far we have seen how to execute a set of statements, if a condition is true. |
|- | |- | ||
| − | | 01 | + | | 01:26 |
|| Now we will see how to execute another set of statements if that condition is false or we may wish to check if some other condition is satisfied. | || Now we will see how to execute another set of statements if that condition is false or we may wish to check if some other condition is satisfied. | ||
| Line 100: | Line 101: | ||
|- | |- | ||
| − | |01 | + | |01:36 |
| − | | | We can do this by using 'else' or 'elseif' keyword respectively. | + | | | We can do this by using '''else''' or '''elseif''' keyword respectively. |
|- | |- | ||
| − | |01 | + | |01:40 |
| − | + | ||
| − | + | ||
| + | | | Here is how we do it. | ||
|- | |- | ||
| − | | 01 | + | | 01:41 |
| − | || In this example, 54 is assigned to a variable n and checked for both true condition using 'if' and false condition using 'else' as described: | + | || In this example, 54 is assigned to a variable 'n' and checked for both '''true''' condition using 'if' and '''false''' condition using 'else' as described: |
|- | |- | ||
| − | | 01 | + | | 01:55 |
| − | | | I will cut this, paste in the | + | | | I will cut this, paste in the Scilab console, hit '''Enter'''. |
|- | |- | ||
| − | | 02 | + | | 02:03 |
| | You see the output. | | | You see the output. | ||
| Line 131: | Line 131: | ||
|- | |- | ||
| − | | 02 | + | | 02:05 |
| | If you notice, the examples shown above are on multiple lines. | | | If you notice, the examples shown above are on multiple lines. | ||
| Line 137: | Line 137: | ||
|- | |- | ||
| − | |02 | + | |02:09 |
|| They can also be written in a single line with proper semicolons and commas. | || They can also be written in a single line with proper semicolons and commas. | ||
| Line 143: | Line 143: | ||
|- | |- | ||
| − | | 02 | + | | 02:19 |
| − | | | I will cut this and paste in the | + | | | I will cut this and paste in the Scilab to execute. Hit '''Enter'''. |
|- | |- | ||
| − | | 02 | + | | 02:27 |
| − | || The select statement allows to combine several branches in a clear and simple way. | + | || The '''select''' statement allows to combine several branches in a clear and simple way. |
|- | |- | ||
| − | |02 | + | |02:31 |
| − | || Depending on the value of a variable, it allows to perform the statement corresponding to the case keyword. | + | || Depending on the value of a variable, it allows to perform the statement corresponding to the '''case''' keyword. |
|- | |- | ||
| − | | 02 | + | | 02:38 |
| | There can be as many branches as required. | | | There can be as many branches as required. | ||
| Line 167: | Line 167: | ||
|- | |- | ||
| − | |02 | + | |02:41 |
| Let us try with an example. | | Let us try with an example. | ||
| Line 173: | Line 173: | ||
|- | |- | ||
| − | |02 | + | |02:44 |
| − | | We will assign 100 to a variable 'n' and check the cases 42, 54 and a default case represented by else. | + | | We will assign 100 to a variable 'n' and check the cases 42, 54 and a default case represented by '''else'''. |
|- | |- | ||
| − | |02 | + | |02:59 |
| − | | Cut, paste hit | + | | Cut, paste, hit '''Enter'''. |
|- | |- | ||
| − | | 03 | + | | 03:06 |
| | Here we see the output . | | | Here we see the output . | ||
| Line 191: | Line 191: | ||
|- | |- | ||
| − | | 03 | + | | 03:09 |
| − | || This brings us to the end of this | + | || This brings us to the end of this Spoken Tutorial on '''Conditional Branching''' using '''Scilab'''. |
|- | |- | ||
| − | | 03 | + | | 03:14 |
| − | | In this tutorial we have learnt the if - elseif - else statement and the select statement. | + | | In this tutorial we have learnt the '''if - elseif - else''' statement and the '''select''' statement. |
|- | |- | ||
| − | | 03 | + | | 03:20 |
| | There are many other functions in Scilab which will be covered in other spoken tutorials. | | | There are many other functions in Scilab which will be covered in other spoken tutorials. | ||
| Line 209: | Line 209: | ||
|- | |- | ||
| − | |03 | + | |03:25 |
|| Keep watching the Scilab links. | || Keep watching the Scilab links. | ||
| Line 215: | Line 215: | ||
|- | |- | ||
| − | | 03 | + | | 03:27 |
|| Spoken Tutorials are part of the Talk to a Teacher project, supported by the National Mission on Education through ICT. | || Spoken Tutorials are part of the Talk to a Teacher project, supported by the National Mission on Education through ICT. | ||
| Line 221: | Line 221: | ||
|- | |- | ||
| − | | 03 | + | | 03:35 |
| − | | | More information on the same is available on the following link | + | | | More information on the same is available on the following link. |
|- | |- | ||
| − | | 03 | + | | 03:38 |
| |Thanks for joining good bye. | | |Thanks for joining good bye. | ||
|} | |} | ||
Latest revision as of 18:01, 25 February 2015
| Time | Narration |
| 00:01 | Welcome to the spoken tutorial on Conditional Branching in Scilab. |
| 00:04 | To practice this tutorial, open the Scilab console window on your computer. |
| 00:09 | We will discuss two types of conditional constructs in Scilab that is the if-then-else construct and the select-case conditional construct. |
| 00:19 | The if statement allows us to execute a group of statements if a given condition is satisfied. |
| 00:24 | Let me give you an example: |
| 00:27 | n is equal 42 if n is equal to equal to 42 (n==42) then disp "the number is 42" end of if construct. |
| 00:37 | Here, 'is equal to'(=) is the assignment operator, which assigns 42 to the variable n, |
| 00:43 | and 'is equal to is equal to' (==) is the equality operator which checks for the equality between the right hand and the left hand side operands. |
| 00:51 | In this case 'n' and 42 and gives the result in Boolean. |
| 00:57 | Here the comma after the first line is optional. |
| 01:01 | Also the then keyword is optional. |
| 01:04 | It can be replaced by a comma or a carriage return. |
| 01:08 | The end keyword ends the if construct. |
| 01:11 | On executing the script, we see the output as follows. |
| 01:20 | So far we have seen how to execute a set of statements, if a condition is true. |
| 01:26 | Now we will see how to execute another set of statements if that condition is false or we may wish to check if some other condition is satisfied. |
| 01:36 | We can do this by using else or elseif keyword respectively. |
| 01:40 | Here is how we do it. |
| 01:41 | In this example, 54 is assigned to a variable 'n' and checked for both true condition using 'if' and false condition using 'else' as described: |
| 01:55 | I will cut this, paste in the Scilab console, hit Enter. |
| 02:03 | You see the output. |
| 02:05 | If you notice, the examples shown above are on multiple lines. |
| 02:09 | They can also be written in a single line with proper semicolons and commas. |
| 02:19 | I will cut this and paste in the Scilab to execute. Hit Enter. |
| 02:27 | The select statement allows to combine several branches in a clear and simple way. |
| 02:31 | Depending on the value of a variable, it allows to perform the statement corresponding to the case keyword. |
| 02:38 | There can be as many branches as required. |
| 02:41 | Let us try with an example. |
| 02:44 | We will assign 100 to a variable 'n' and check the cases 42, 54 and a default case represented by else. |
| 02:59 | Cut, paste, hit Enter. |
| 03:06 | Here we see the output . |
| 03:09 | This brings us to the end of this Spoken Tutorial on Conditional Branching using Scilab. |
| 03:14 | In this tutorial we have learnt the if - elseif - else statement and the select statement. |
| 03:20 | There are many other functions in Scilab which will be covered in other spoken tutorials. |
| 03:25 | Keep watching the Scilab links. |
| 03:27 | Spoken Tutorials are part of the Talk to a Teacher project, supported by the National Mission on Education through ICT. |
| 03:35 | More information on the same is available on the following link. |
| 03:38 | Thanks for joining good bye. |
