Please help me with ideas how to solve this task

[fool1]

Produce JavaScript code (and any necessary HTML) that will perform the following functions:
1. Using the prompt and alert functions, invite the user to input 5 marks (integers) in the range 0–100.
2. Calculate the average (mean) of the 5 marks as a rounded integer or a floating point number.
3. If the average mark is 0–39, then display a message saying that the grade is a Fail, 40–69 is a Pass, and 70–100 is a Distinction. If the value is less than 0 or greater than 100, display a message saying that there has been an input error.

[Dormilich]

1. use an HTML form with the number type input elements.
2. JavaScript only knows floats. simple way uses a loop, advanced way can use array functions
3. use if() conditions

[fool1]

please can you show example? I am stupid and new to JavaScript

[Dormilich]

stupidity and newness are no excuse to not put in some effort.

[fool1]

<script>
    function promptForNumber( text)
{
    if(text == '' ){
     text = "Please enter a number from 1 to 100";   
    }
    var number = parseInt(window.prompt(text, ""));
    checkNumber(number);
 
}
function checkNumber(number){
 
    if (number <= 100 && number >= 1) {
 
} else if (isNaN(number)) {
    promptForNumber("Please enter a number from 1 to 100", "");
} else {
    promptForNumber("Your number (" + number + ") is not between 1 and 100", "");
}
 
}
</script>

[Dormilich]

that’s definitely something to work on.

although there is a crucial unclearness in the task description. is the user supposed to input 5 numbers at once or one after another?

that would greatly influence your application design.

[fool1]

I beleive the numbers should be entered one after another and then button to calculate mean

[Dormilich]

you will never come to use the button because you have one prompt after another.

if your input solely relies on prompts, then you must find a condition when to not show again a prompt. at that time (when no more input comes) you can start the calculation right away.

for me it would make more sense to use a form for input (and it would be more user-friendly as well), esp. since you have a defined number of inputs. additionally you could use the built-in validation.

I am aware that that would do away the prompt and alert functions altogether. but those shouldn’t be used for UI design anyways.

[fool1]

ok thanks a lot. what if the number are to be computed at once ? could help with some part of the code?

[Dormilich]

first you need to get the numbers.

once you have the numbers together it doesn’t matter any more how you got them.