Write a java Script program that ask the user to enter a valid test grades, your program should calculate the average, display the result on the screen and check the user enter a valid test grade. • Declare and initialize the necessary variables.  • Aske the user to enter the ID.  • Display the average using header2.  • Use a function to ensure the user enter a valid test grade (0 to 100), otherwise print a message’ the grade is not valid. • Use a loop to aske the user to enter the test grades, -1 to stop the loop.  • Print the output on a table.  • Add page title with your id.  • Your output should be as the following.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Q1: Write a java Script program that ask the user to enter a valid test grades, your program
should calculate the average, display the result on the screen and check the user enter a valid test
grade.
• Declare and initialize the necessary variables. 
• Aske the user to enter the ID. 
• Display the average using header2. 
• Use a function to ensure the user enter a valid test grade (0 to 100), otherwise print a
message’ the grade is not valid.
• Use a loop to aske the user to enter the test grades, -1 to stop the loop. 

• Print the output on a table. 
• Add page title with your id. 
• Your output should be as the following.

Enter your ID please:2000
Enter a test grade (0 to 100) please,-1 to exit: c
The grade is not valied,enter a valied test grade please(0 to100): 90
Enter a test grade (0 to 100) please,-1 to exit: 85
Enter a test grade (0 to 100) please,-1 to exit: 77
Enter a test grade (0 to 100) please,-1 to exit:-1
Average Test Grade
ID
2000
Test1
90
Test2
Test3
85
77
Average test
84
Transcribed Image Text:Enter your ID please:2000 Enter a test grade (0 to 100) please,-1 to exit: c The grade is not valied,enter a valied test grade please(0 to100): 90 Enter a test grade (0 to 100) please,-1 to exit: 85 Enter a test grade (0 to 100) please,-1 to exit: 77 Enter a test grade (0 to 100) please,-1 to exit:-1 Average Test Grade ID 2000 Test1 90 Test2 Test3 85 77 Average test 84
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