functions-101/grade-calc.js

// students score, total possible score
// 15/20 -> You got a C (75%)!
// A 90-100, B 80-89, C 70-79, D 60-69, F 0-59


const gradeCalc = function (studentScore, totalPossibleScore) {
    const grade = (studentScore / totalPossibleScore) * 100
    let letterGrade = ''
    if (grade <= 100 && grade >= 90) {
        letterGrade = 'A'
    } else if (grade <= 89 && grade >= 80) {
        letterGrade = 'B'
    } else if (grade <= 79 && grade >= 70) {
        letterGrade = 'C'
    } else if (grade <= 69 && grade >= 60) {
        letterGrade = 'D'
    } else {
        letterGrade = 'F'
    }
    return `You got a ${letterGrade} (${grade}%)`
}

const result = gradeCalc(45.0,100.0)

console.log(result)