Script to get your BMI for Scriptable app

bmi.js

// Connor is amazing

async function checkInt(data) {
    num = parseFloat(data);
    if (num.toString() === data) return num;
    let alert = new Alert();
    alert.title = "BMI";
    alert.message = "Please enter only Numbers";
    alert.addCancelAction("Ok");
    await alert.present();
    throw "Use only Numbers";
}

function getBmiRange(bmi) {
    if (bmi < 18.5) return "Underweight";
    else if (bmi < 24.9) return "Normal or Healthy Weight";
    else if (bmi < 29.9) return "Overweight";
    else if (bmi >= 30) return "Obese";
}

async function main() {
    let alert = new Alert();
    alert.title = "Enter Info ~ BMI";
    alert.addTextField("Weight (Pounds)");
    alert.addTextField("Height (Ft)");
    alert.addTextField("Height (In)");
    alert.addAction("Submit");
    alert.addCancelAction("Cancel");
    let info = await alert.present();

    if (info === -1) return;
    weight = await checkInt(alert.textFieldValue(0));
    heightFT = await checkInt(alert.textFieldValue(1));
    heightIN = await checkInt(alert.textFieldValue(2));

    height = heightFT * 12 + heightIN;

    bmi = (703 * weight) / (height * height);

    alert = new Alert();
    alert.title = "BMI";
    alert.message = `Your BMI: ${bmi.toFixed(2).toString()}\n${getBmiRange(bmi)}`;
    await alert.present();
}

main();