JSFiddle - React, Tailwind, and code Playground

by LeD4eG

HTML

<html>
    <head>
        <title>Simple func</title>
            
    </head>
        <body></body>

</html>

JavaScript

function sumTo(n) {

    return (n>0)? n + sumTo(n-1) : n;
}
var number = parseInt(prompt("Введите число", ''));

alert(sumTo(number));