JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="duzinaNiza()">Do it!</button>

JavaScript

duzinaNiza = function () {
    var brClanova = prompt("Enter the number of array elements:");

    if (brClanova > 0) {
        var niz = new Array();
        var maximum;
        
        for (i=0; i<brClanova; i++) {
            var temp = +prompt("Enter "+ i+1 +". number:");
            if(i===0) { maximum = temp }
            else { maximum = (temp > maximum)?temp:maximum; }
            
        }

        alert("Greatest value in array is: " + maximum);   
    }
}