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

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Revision as of 16:42, 10 July 2014

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 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