how string interpolation works in javascript code example

Example 1: javascript string interpolation

var animal = "cow";
var str=`The ${animal} jumped over the moon`; // string interpolation

Example 2: #{} js

let value = dummy`Ik ben ${name} en ik ben ${age} jaar`;

function dummy() {
   let str = "";
   strings.forEach((string, i) => {
       str += string + values[i];
   });   
   return str;
}