const toRadians = (degrees) => degrees * Math.PI / 180;

const distance = (x1, y1, x2, y2) => {
    const deltaX = x2 - x1;
    const deltaY = y2 - y1;
    return Math.hypot(deltaX, deltaY);
}

document.getElementById("ok").addEventListener("click", () => {
    const x1 = document.getElementById("x1").value;
    const y1 = document.getElementById("y1").value;
    const x2 = document.getElementById("x2").value;
    const y2 = document.getElementById("y2").value;

    /*const inputValue = document.getElementById("coordinaten").value;
    const coordinates = inputValue.split(";");
    const x1 = coordinates[0];
    const y1 = coordinates[1];
    const x2 = coordinates[2];
    const y2 = coordinates[3];

     */
    const h = distance(
        Number.parseFloat(x1), Number.parseFloat(y1),
        Number.parseFloat(x2), Number.parseFloat(y2)
    )
    document.getElementById("output").textContent = `${h}`;
})