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Activity lesson
The document discusses debugging programs by finding and resolving errors or bugs. It provides examples of code with errors and asks the reader to identify them. It also provides programming activities for writing simple programs that output messages based on user input and conditional statements.
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Activity lesson
- 1. Testing and debugginga program When we write a program and it does not produce an output, this is known as a bug.To find these bugs and resolve any errors is known as Debugging.
- 2. Find the oneerror in this code? <html> <body> <script type="text/javascript"> var name = p ("enter your name",""); document.write(name.substring(0,1)); </script> </body> </html>
- 3. Find the twoerrors in this code? <html> <body> <script type="javascript"> var maxmarks = prompt("enter the max marks of test",""); var marks = prompt("enter the marks of test",""); maxmarks=parseInt(maxmarks); marks=parseInt(marks); var percen=marks/maxmarks*100 if(percen>80) { document.write("you have",percen,"% in this test"); document.write("<PRE>nCongratulations for your performance </PRE>"); } And { document.write (" you need to work a little more for excellence"); document.write ("<PRE>nPlan better and you will be there</PRE>"); } </script> </body> </html>
- 4. Find five errorsin this code? <html> <body> <script type="text/javascript"> var marks = prompt("enter the marks of test","") marks=parseInt(m); if(marks60) { document.write("grade is a") else if (marks >=45) { document.write("grade is b") } else if (marks >=30) { document.write("grade is c") } else { document.write("grade is f") } </body> </html>
- 5. Programming activity Write aprogram that will display a message, the message can be anything you want. *Use the keyword “document.write”.
- 6. Write a programthat will display either a yes or no message when you enter a number. For example to see if a number divides by 2 or 3. *Remember to use the “if condition” and the keyword “parseInt” for this program.
- 7. Write a programthat will display either a yes or no message when you enter a number. For example to see if a number divides by 2 or 3. *Remember to use the “if condition” and the keyword “parseInt” for this program.