![]() Writing our own functions and using them within Scilab Th eadditional things we need to learn are:īoolean operations, expressions and statements. Nevertheless, we already know a little bit about Scilab programming language, such as, creating variables, writing expressions and statements, calling functions. That is because, we have not interactively used any program flow control structures such as if(), for etc. Program control structures for looping and branchingīoolean operators, expressions and statementsĭuring our interaction with Scilab, we have been using the Scilab programming language even though we have been thinking we are using Scilab commands and not the programming language. You can access by pressing F1 or using help menu in your Scilab Window.In this session you will learn the following: Note: Some of data in this article is taken from the Scilab help manual. Save the file and execute is by pressing F5. Or you can use editor in Scilab (SciNotes) and enter the program lines in that. Running the programs: For running the above programs, you can create program files with any of the text editor and save them as filename.sce. Note: The number of characters used to define the body of any conditional instruction (if, while, for or select/case) must be limited to 16k. Finally when it becomes grater then 10 loop exits. Each time value of i is increased in loop. Then same statement is executed to print number and its square. Variable i is assigned a value and then it evaluated to be less than 10. Again the task performed by for loop in above example is repeated by while loop in below program. In this looping statement, the expression following while keyword is evaluated each time and if it is true the statements inside loop are executed. Syntax for while loop is as follow: while expr ,instructions., end Now here is last but not least while loop. Each time it executes the printf statement, which prints the given statement,each time changing the value of variable as supplied by the loop. Expression is 1:10 which forms a row vector of values from 1 through 10. ![]() ![]() So comparing the example with the syntax we can find that i is variable name. Earlier two control statements are used for decision making. Now we will move towards for loop control statement. Similar is the method for case expression. You can use either expression or variable name after select keyword. Now you would have observed that I used the variable in place of expression following the select keyword. Following is the program for realizing above if_then_else program with select. Else no execution in block will take place. If none of case expressions match then instructions following else are executed, if it is included. If any of the expression is true the set of statements following that case will be executed. Expression following select is evaluated and matched with expressions following case keyword. In above block of statement select is keyword. The calling sequence for this is: select expr, Now lets move on to select?case statement. If you are wondering how to run this program, then scroll down to bottom of this post. Then it keeps comparing the value of variable from 1 through 7 and outputs respective day number. First statement of the program takes input from the user in form of number and store it into variable named ?day?. It will be more clear by following example: //if_then_else.eceĪs you can notice the program is a simple one based on converting week number in to days. else provides alternate group of statements if no condition is true. elseif provide alternate set of statements if expression accompanied by elseif is true. The else and elseif statements are optional. The if statement evaluates a logical expression and executes a group of statements when the expression is true. In Scilab every control statement block is ended by end keyword. So here is calling sequence for if then else : if expr1 then statementsĪs you can observe the statement block is ended with end keyword. Syntax is what varies from language to language. If else then statement is similar to any language on the functioning level. Lets begin our discussion with our first control statement. So we will begin with listing our type of control statements in Scilab : So as a language it is also having control statements. ![]() Is Scilab a language? Yes, you can consider as a scripting language for your numerical tasks. In this article we will discuss the control statements of Scilab.Ĭontrol statements are very essential part of any language. We won’t discuss the commands further as we will discuss the required commands as we will come across them. In my last introductory article to Scilab we have discussed very basic commands.
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