Convert number grade to letter grade help

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Hey guys, I'm pretty new to JavaScript and I'm trying to build a program that converts a number grade to a letter grade. When I go and try to run the code and enter a number such as '75', I get the output 'F' and this goes for every number '85', '90' etc, I still get the output 'F'. Could someone please help me try to understand where I went wrong? Thanks.

<!DOCTYPE html>
<html lang = "en">
<head>
<meta charset = "utf-8" />

<title>Grade Converter</title>

</head>
<body>

<h3>Grade</h3>

<input type="text" id="numGrade" />
<button onclick="convert()">Convert</button>

<br></br>
Grade:<span id="letterGrade"></span>

<script src = "example1.js">
</script>
</body>
</html>

let num = document.getElementById('numGrade').value;

function convert(){

    let numeric = parseInt(num);
    let letterGrade = '';


    if(num >= 90 && num <= 100)
    {
        letterGrade = "A ";
    }
    else if(num >= 80 && num <= 89)
    {
        letterGrade = "A";
    }
    else if(num >= 75 && num <= 79)
    {
        letterGrade = "B ";
    }
    else if(num >= 70 && num <= 74)
    {
        letterGrade = "B";
    }
    else if(num >= 65 && num <= 69)
    {
        letterGrade = "C ";
    }
    else if(num >= 60 && num <= 64)
    {
        letterGrade = "C";
    }
    else if(num >= 55 && num <= 59)
    {
        letterGrade = "D ";
    }
    else if(num >= 50 && num <= 54)
    {
        letterGrade = "D";
    }
    else if(num >= 48 && num <= 49)
    {
        letterGrade = "E";
    }
    else if (num >= 0 && num <= 47)
    {
        letterGrade = "F";
    }
    else
    {
        letterGrade = "You entered the wrong grade.";
    }
    document.getElementById("letterGrade").innerHTML=letterGrade;
   
}

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gsxch287

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Posted: 6 months ago
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