KTurtle/C3/Common-Errors-in-KTurtle/English

Visual Cue	Narration
Slide Number 1	Hello everybody. Welcome to this tutorial on Common Errors in KTurtle.
Slide Number 2 Learning Objectives	In this tutorial, we will learn about Syntax errors and Runtime errors
Slide Number 3 System Requirement	To record this tutorial I am using, Ubuntu Linux OS v. 12.04. KTurtle v. 0.8.1 beta.
Slide Number 4 Pre-requisites	We assume that you have basic working knowledge of KTurtle If not, for relevant tutorials, please visit our website. http://spoken-tutorial.org
	First I will explain about Types of errors.
Slide Number 5 Syntax Errors	A syntax error is a violation of grammatical rules, of a programming language. Compilation fails when a program has syntax errors. Syntax errors are easy to find and fix. For Eg: Unmatched parentheses, square brackets and curly braces. Use of variable that has not been declared. Missing quotes in strings.
Switch to KTurtle Application Dash home >>Search bar appears>> In the Search bar type KTurtle Click on the KTurtle icon.	Let's open a new KTurtle Application. Click on Dash home. The Search bar appears. In the Search bar, type KTurtle. Click on the KTurtle icon.
	Let's begin the tutorial with some types of syntax errors.
	I already have a program in a text editor.
reset $a=ask "enter any number and click Ok" $r = ask "enter any number and click ok" $n = ask "enter any number and click ok" $T = $a*($r^$n)*($r^-1) print $T	Let copy the program into Kturtle Editor. Please pause the tutorial and type the program into KTurtle editor Resume the tutorial after typing the program.
Zoom text	Let me zoom into the program text. It may possibly be a little blurred.
	To explain the error in the program, I will delete part of the code.
Highlight $a=ask "enter any number and click Ok"	Here, I will deleted the line $a=ask "enter any number and click Ok"
Run the program	Let's Click on Run button to run the program Complier shows the following error, The variable $a was used without first being assigned to a value.
Replace the deleted line	I will replace the deleted line $a=ask "enter any number and click Ok"
Run the program	Let's run again press F5 key to run the program We see that the program runs without errors.
	Next let's look at another type of error.
	I already have a program in a text editor.
reset $degree=ask "enter any angle value and click OK" $radian=(pi/180)*$degree go 50,50 print "Value in radians is"+ " " +$radian spritehide	Let me copy the program into Kturtle Editor Please pause the tutorial and type the program into KTurtle editor Resume the tutorial after typing the program.
Zoom text	Let me zoom into the program text. It may possibly be a little blurred.
Highlight $	Let's delete $ signs in the program.
Run the program	Let's Click on Run button to run the program. Complier shows the following error, you cannot put “=” here
Replace $ signs	Let's replace the $ signs and run again. Program runs properly
Highlight "Value in radians is"	Let's remove the one of the quotes of the string.
Run the program	Let's click on Run button to run the program Complier shows the following error, text string was not properly closed, expected a double quote “ ” to close the string.
Repalce the quotes	Let's replace the quotes and run again. press F5 key run the program. program runs without errors.
Slide Number 6 Runtime errors	Run-time error occurs during the execution of a program. It may crash the program when you run it. Runtime errors are commonly due to wrong input from the user. Compiler cannnot find these errors. For example: Trying to multiply or divide by a variable that contains no value. Run a loop without a condition or increment.

Contributors and Content Editors

Arya Ratish, Madhurig