ascii with obj

function valueOfAString(arr) {

    let text = arr[0].split("");
    let caseNeeded = arr[1];
    let lowerCase = {
        a: 97,
        b: 98,
        c: 99,
        d: 100,
        e: 101,
        f: 102,
        g: 103,
        h: 104,
        i: 105,
        j: 106,
        k: 107,
        l: 108,
        m: 109,
        n: 110,
        o: 111,
        p: 112,
        q: 113,
        r: 114,
        s: 115,
        t: 116,
        u: 117,
        v: 118,
        w: 119,
        x: 120,
        y: 121,
        z: 122,

    }
    let upperCase = {
        A: 65,
        B: 66,
        C: 67,
        D: 68,
        E: 69,
        F: 70,
        G: 71,
        H: 72,
        I: 73,
        J: 74,
        K: 75,
        L: 76,
        M: 77,
        N: 78,
        O: 79,
        P: 80,
        Q: 81,
        R: 82,
        S: 83,
        T: 84,
        U: 85,
        V: 86,
        W: 87,
        X: 88,
        Y: 89,
        Z: 90,
    }
    let sumLower = 0;
    let sumUpper = 0
    for (let x = 0; x < text.length; x++) {
        let currLetter = text[x];
        if (currLetter.charCodeAt(0) >= 65 && currLetter.charCodeAt(0) <= 90) {
            //sumUpper += currLetter.charCodeAt(0)
            sumUpper += upperCase[currLetter];
        } else if (currLetter.charCodeAt(0) >= 97 && currLetter.charCodeAt(0) <= 122) {
            //sumLower += currLetter.charCodeAt(0);
            sumLower += lowerCase[currLetter];
        }
    }
    if (caseNeeded === "UPPERCASE") {
        console.log(`The total sum is: ${sumUpper}`)
    } else if (caseNeeded === "LOWERCASE") {
        console.log(`The total sum is: ${sumLower}`)
    }

}

valueOfAString(['HelloFromMyAwesomePROGRAM',
    'LOWERCASE']);
console.log("--------------------------------------");
valueOfAString(['AC/DC',
    'UPPERCASE'])