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Scilab/C2/Conditional-Branching/English - Revision history
2026-05-15T15:38:31Z
Revision history for this page on the wiki
MediaWiki 1.23.17
https://script.spoken-tutorial.org/index.php?title=Scilab/C2/Conditional-Branching/English&diff=11241&oldid=prev
PoojaMoolya at 04:30, 13 June 2014
2014-06-13T04:30:06Z
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>! <center>Visual <del class="diffchange diffchange-inline">Clue</del></center></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>! <center>Visual <ins class="diffchange diffchange-inline">Cue</ins></center></div></td></tr>
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PoojaMoolya
https://script.spoken-tutorial.org/index.php?title=Scilab/C2/Conditional-Branching/English&diff=283&oldid=prev
Chandrika: Created page with ''''Title of script''': Conditional Branching '''Author: Anuradha Amrutkar''' '''Keywords: if-then-else, select-case''' {| style="border-spacing:0;" ! <center>Visual Clue</ce…'
2012-11-27T14:03:32Z
<p>Created page with ''''Title of script''': Conditional Branching '''Author: Anuradha Amrutkar''' '''Keywords: if-then-else, select-case''' {| style="border-spacing:0;" ! <center>Visual Clue</ce…'</p>
<p><b>New page</b></p><div>'''Title of script''': Conditional Branching<br />
<br />
'''Author: Anuradha Amrutkar'''<br />
<br />
'''Keywords: if-then-else, select-case'''<br />
<br />
<br />
<br />
{| style="border-spacing:0;"<br />
! <center>Visual Clue</center><br />
! <center>Narration</center><br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Welcome to the spoken tutorial on Conditional Branching in Scilab. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| To practice this tutorial open the scilab console window on your computer <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| We will discuss two types of Conditional constructs in Scilab that is the "if-then-else" construct and the "select-case conditional" construct. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| The if statement allows us to execute a group of statements if a given condition is satisfied. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Let me give you an example: <br />
<br />
n = 42, <br />
if (n == 42) then <br />
disp("The number is forty two")<br />
end <br />
<br />
of if construct. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Here '=' is the assignment operator, which assigns 42 to the variable n, and '==' is the equality operator, which checks for the equality between the right hand and the left hand side operands.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| In this case n and 42 and gives the result in Boolean. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Here the comma after the first line is optional, Also the ''then'' keyword is optional.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| It can be replaced by a comma or a carriage return. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| The end keyword ends the "if" construct. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| On executing the script, we see the output as follows. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| So far we have seen how to execute a set of statements if a condition is true. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| 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.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| We can do this by using 'else' or 'elseif' keyword respectively. Here is how we do it (the action is shown) <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| 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:<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| I will cut this paste in the scilab console hit enter <br />
<br />
<br />
n = 54, <br />
if (n == 42) then <br />
disp("The number is forty two")<br />
elseif (n == 54) then, <br />
disp("The number is fifty four") <br />
else <br />
disp("The number is neither forty two nor fifty four")<br />
end<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| You see the output (output is displayed). <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| If you notice, the examples shown above are on multiple lines. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| They can also be written in a single line with proper semicolons and commas.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| I will cut this and paste in the scilab to execute hit enter <br />
<br />
x = 3; y = 5; z = 4; if x>5 then disp(x), elseif x>6 then disp(y), else disp(z), end<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| The select statement allows to combine several branches in a clear and simple way.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Depending on the value of a variable, it allows to perform the statement corresponding to the case keyword.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| There can be as many branches as required. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Narration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Let us try with an example.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| We will assign 100 to a variable 'n' and check the cases 42, 54 and a default case represented by else cut paste hit enter<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| n = 100, <br />
<br />
<br />
select n<br />
<br />
case 42<br />
disp("The number is forty two")<br />
<br />
case 54<br />
disp("The number is fifty four")<br />
<br />
else <br />
disp("The number is neither forty two nor fifty four")<br />
<br />
end<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Demonstration<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Here we see the output . (Shows the output)<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| This brings us to the end of this spoken tutorial on Conditional Branching using Scilab.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| In this tutorial we have learnt the if - elseif - else statement and the select statement.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| There are many other functions in Scilab which will be covered in other spoken tutorials.<br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Keep watching the Scilab links. <br />
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|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| Spoken Tutorials are part of the Talk to a Teacher project, supported by the National Mission on Education through ICT. <br />
<br />
|-<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:none;padding:0.0382in;"| Slide<br />
| style="border-top:none;border-bottom:0.0139in solid #000000;border-left:0.0139in solid #000000;border-right:0.0139in solid #000000;padding:0.0382in;"| More information on the same is available at [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutorial.org/NMEICT-Intro]. <br />
<br />
|}</div>
Chandrika