occurence of a character in a string checks every index of it.

var alphabet='';

function repeatalphabet(){
var alphabet = document.getElementById("inputalpha").value
var inputalpha = document.getElementById("alpharesult")
inputalpha.innerHTML=alphabet;
//console.log(alphabet)
return alphabet;
}

function stringMalipulation(){

var inputValue = document.getElementById("inputString").value;
var inputString= document.getElementById("strResult")
inputString.innerHTML=inputValue;

// console.log(inputValue)
let il=inputValue.length
console.log(il,alphabet)
for(let i=0; i<=il; i++) {
if(inputValue.charAt(i) == repeatalphabet())
{
console.log(i) ;
};

};    

};