Create a script that asks for the student's percentage point through a prompt box. Using the following scenarios write if else statements that determine the student's letter grade and display the grade in an alert box: Percentage Letter Grade >=90 A Between 80 and 89 B Between 70 and 79 C Between 60 and 69 D Lower than 60 F

Explanation:

Program :

var percentage= prompt("Enter the percentage of the student"); // take the input from the user.

if(percentage>=90)//check condition for greator than 90.

alert("your grade is \"A\"");

else if(percentage>=80) // check condition for 80 and 89.

alert("your grade is \"B\"");

else if(percentage>=70) // check condition for 70 and 79.

alert("your grade is \"C\"");

else if(percentage>=60) // check condition for 60 and 69.

alert("your grade is \"D\"");

else // check condition for less than 60.

alert("your grade is \"F\"");

Output:

Code Explanation:

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