<html>
<head>
<title>Body Mass Index</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
.wynik{
height: 150px;
width: 400px;
margin: 0 auto;
background-color: gray;
color: white;
font-size: 30px;
line-text: 150px;
}
</style>
</head>
<body>
<div><h3>Body Max Index</h3></div>
<br><br><br><br>
<div class="wynik">
<script>
var masa = prompt("Podaj masę ciała");
var wzrost = prompt("Podaj wzrost w cm");
var bmi;
var txt = "";
console.log("masa = " + masa);
console.log("wzrost = " + wzrost);
if (wzrost == "" || masa == "" || wzrost == null || masa == null) {
document.write("nie wpisałeś jakiejś zmiennej");
} else {
var pomoc = wzrost - 1;
console.log("wzrost = " + pomoc);
if (isNaN(pomoc)) {
txt = "Wzrost to nie jest liczba!";
}
// pomoc = parseInt(masa);
pomoc = masa - 1;
console.log("masa = " + pomoc);
// if (pomoc == "NaN") {
if (isNaN(pomoc)) {
txt = txt + " Waga nie jest liczbą!";
}
if (txt.lenght > 0) {
document.write(txt);
} else {
wzrost = wzrost / 100;
bmi = masa / (wzrost * wzrost);
console.log(bmi);
if (bmi < 18.5) {
txt = "Masz niedowagę";
} else if (bmi < 25) {
txt = "Twoja waga jest prawidłowa";
} else if (bmi >= 25.00) {
document.write("Masz nadwagę!!");
}
document.write(txt + " BMI równa się " + bmi.toFixed(2));
}
}
</script>
</div>
</body>
</html>
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