Difference between revisions of "Scilab/C2/Conditional-Branching/English-timed"

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| 00:01
 
| 00:01
  
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| | Welcome to the spoken tutorial on Conditional Branching in Scilab.
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| | Welcome to the spoken tutorial on '''Conditional Branching''' in '''Scilab'''.
  
 
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|-
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| 00:04
 
| 00:04
  
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| To practice this tutorial open the scilab console window on your computer
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| To practice this tutorial, open the Scilab console window on your computer.
  
 
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|-
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|00:09
 
|00:09
  
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| | We will discuss two types of Conditional constructs in Scilab that is the  "if-then-else" construct and the "select-case conditional" construct.
+
| | We will discuss two types of conditional constructs in Scilab that is the  '''if-then-else''' construct and the '''select-case''' conditional construct.
  
 
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|-
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| 00:19
  
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| | The if statement allows us to execute a group of statements if a given condition is satisfied.
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| | The '''if statement''' allows us to execute a group of statements if a given condition is satisfied.
  
 
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| |n is equal 42 if n is equal to equal to 42 then disp the number is 42,  end of if construct.
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| |'''n is equal 42 if n is equal to equal to 42 (n==42) then disp "the number is 42" end''' of if construct.
  
 
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| | Here 'is equal to' is the assignment operator, which assigns 42 to the variable n,  
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| | Here, 'is equal to'(=) is the assignment operator, which assigns 42 to the variable n,  
  
 
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| | 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.
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| | 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.
  
 
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| In this case n and 42 and gives the result in Boolean.
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| In this case 'n' and 42 and gives the result in Boolean.
  
 
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| | Here the comma after the first line is optional,
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| | Here the comma after the first line is optional.
  
 
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| | Also the ''then'' keyword is optional.
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| | Also the '''then''' keyword is optional.
  
 
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|| It can be replaced by a comma or a carriage return.
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|| It can be replaced by a '''comma''' or a '''carriage return'''.
  
 
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|| The end keyword ends the "if" construct.
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|| The '''end''' keyword ends the '''if''' construct.
  
 
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| | So far we have seen how to execute a set of statements if a condition is true.
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| | So far we have seen how to execute a set of statements, if a condition is true.
  
 
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|-
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|01:36
  
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| | We can do this by using 'else' or 'elseif' keyword respectively.  
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| | We can do this by using '''else''' or '''elseif''' keyword respectively.  
  
 
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|01:40
  
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| | Here is how we do it
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| | Here is how we do it.
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+
  
 
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|| 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:
  
 
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| | I will cut this, paste in the scilab console hit enter
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| | I will cut this, paste in the Scilab console, hit '''Enter'''.
  
 
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| | I will cut this and paste in the scilab to execute. Hit enter
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| | I will cut this and paste in the Scilab to execute. Hit '''Enter'''.
  
 
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|| The select statement allows to combine several branches in a clear and simple way.
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|| The '''select''' statement allows to combine several branches in a clear and simple way.
  
 
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|-
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|02:31
  
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|| Depending on the value of a variable, it allows to perform the statement corresponding to the case keyword.
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|| Depending on the value of a variable, it allows to perform the statement corresponding to the '''case''' keyword.
  
 
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| We will assign 100 to a variable 'n' and check the cases 42, 54 and a default case represented by else.  
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| We will assign 100 to a variable 'n' and check the cases 42, 54 and a default case represented by '''else'''.  
  
 
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|02:59
  
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| Cut,  paste hit enter
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| Cut,  paste, hit '''Enter'''.
  
 
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|-
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| 03:09
 
| 03:09
  
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|| This brings us to the end of this spoken tutorial on Conditional Branching using Scilab.
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|| This brings us to the end of this Spoken Tutorial on '''Conditional Branching''' using '''Scilab'''.
  
 
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| 03:14
  
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| 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.
  
 
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|-
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| 03:35
 
| 03:35
  
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| | More information on the same is available on the following link  
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| | More information on the same is available on the following link.
  
 
|-
 
|-

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.

Contributors and Content Editors

Gaurav, Kavita salve, PoojaMoolya, Sandhya.np14, Sneha

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