Scilab/C2/Conditional-Branching/English-timed

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