window.onload = function(){ var but1 = document.getElementById("butt1"); var out1 = document.getElementById("tab1"); var out2 = document.getElementById("tab2"); var but2 = document.getElementById("butt2"); but2.addEventListener("click",function(){ out2.innerHTML = ""; var inp = document.getElementById("input").value; var arr = inp.split(""); check(inp); function check(ar){ var count = 0; for(var j1=0; j12"; if(j1"; if(count == 1){ out2.innerHTML = "Yey!😁 " + inp + " is a Happy Number, as
" + out2.innerHTML; return; } if(count == 4){ out2.innerHTML = "Oowwww😖 " + inp + " is a Sad Number, as
" + out2.innerHTML; return; } check(count.toString()); } }) but1.addEventListener("click",function(){ var v1 = parseInt(document.getElementById("input1").value); var v2 = parseInt(document.getElementById("input2").value); out1.innerHTML = " List of Happy Numbers in the range " + v1 + "-" + v2 + ":
"; var setInt = setInterval(function(){ if(v1 > v2){ out1.innerHTML += " That's all!"; clearInterval(setInt); return; } check2(v1.toString()); function check2(ar){ var count = 0; for(var j1=0; j1"; return; } if(count == 4){ return; } check2(count.toString()); } v1++; },10) }) }

Happy Numbers Challenge