<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>JavaScript: funkcje.</title>
</head>
<body>
<form>
Podaj liczbę radianów: <input id="input1" type="text" value="3.14159">
<br>
<button onclick="przelicz(); return false;">
Przelicz na stopnie
</button>
<p id="paragraf1"></p>
</form>
<script>
function przelicz(){
var I1 = document.getElementById("input1");
var x = Number(I1.value);
var y = function (radiany){
return (radiany * 180 / Math.PI);
}
var PI = document.getElementById("paragraf1");
P1.innerHTML = x +" radianów to " + y(x) + " stopni";
}
</script>
</body>
</html>
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