for.js

const contacts = [
    {
        "firstName": "Akira",
        "lastName": "Laine",
        "number": "0543236543",
        "likes": ["Pizza", "Coding", "Brownie Points"]
    },
    {
        "firstName": "Harry",
        "lastName": "Potter",
        "number": "0994372684",
        "likes": ["Hogwarts", "Magic", "Hagrid"]
    },
    {
        "firstName": "Sherlock",
        "lastName": "Holmes",
        "number": "0487345643",
        "likes": ["Intriguing Cases", "Violin"]
    },
    {
        "firstName": "Kristian",
        "lastName": "Vos",
        "number": "unknown",
        "likes": ["JavaScript", "Gaming", "Foxes"]
    }
];

let lookUpProfile = (name, prop) => {
  for(let i = 0; i < contacts.length; i++) {
    if(name === contacts[i]["firstName"] && contacts[i].hasOwnProperty(prop)) {
      console.log(contacts[i][prop])
    }
    else if(name !== contacts[i]['firstName']) {
      console.log("no such contact")
    }
    else{console.log("no such property")}
  }
}

lookUpProfile("Harry", "number")