add to existing html code example

Example 1: jquery append

$("p").append(" <b>Appended text</b>.");

Example 2: for each append to document

var person = {
    firstName: "john",
    lastName: "doe",
    age: 45,
    placeOfBirth: "somewhere"
}

for(var key in person) {
    
        var p = document.createElement("p");
        p.innerHTML = person[key];
        document.body.appendChild(p)
    
}