greetings

function greetings(input) {
    let name = input.shift();
    console.log(`Hello, ${name}!`);
}

greetings(["Georgi"]);

function greetings1(input) {
    let name = input.shift();
    console.log(`Hello, ${name}!`);
}

greetings1(["Liliana"]);

function concatenateData(input) {
    let firstName = input.shift();
    let lastName = input.shift();
    let age = input.shift();
    let town = input.shift();
    console.log(`You are ${firstName}, ${lastName}, a ${age}-years old person from ${town}.`);
}

concatenateData(["Maria", "Ivanova", 20, "Sofia"]);

function concatenate(input) {
    let firstName = input.shift();
    let lastName = input.shift();
    let age = input.shift();
    let town = input.shift();
    console.log(`You are ${firstName}, ${lastName}, a ${age}-years old person from ${town}.`);
}

concatenate(["Nikolai", "Georgiev", 10, "Sofia"]);

function squareArea(input) {
    let a = Number(input.shift());
    let area = a * a;
    console.log(area);
}

squareArea(["5"]);