JSFiddle - React, Tailwind, and code Playground

JavaScript

function duzinaNiza() {
    var brClanova = prompt("Enter the number of array elements:")*1; //convert string to intger

    if (brClanova > 0) {
        var niz = new Array();

        for (i=0; i<brClanova; i++) {
            var redniBr = i+1;
            niz[i] = prompt("Enter "+ redniBr +". array number:")*1;
            //prompt for geting each array element
        }


        var maximum = niz[0];

        for (a=0; a<brClanova; a++) {

            if (maximum < niz[a]) {
                maximum = niz[a];
            }
        }

        document.write("Greatest value in array is: " + maximum);   
    }
}
    duzinaNiza()