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// // Add the string "passed" to every element in the array below:

let students = ["Sebastian", "Oliver", "Samuel", "Hugo", "Lily", "Vasilis"]

students.forEach((value, index, array) => {
    console.log(value);
    array[index] += " passed";
})

console.log(students);

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// Same exercises from lesson 6 e0.js & e1.js

// E1.
// Write an arrow function that takes as parameters: the userName and the userBirthMonth and prints the following:
// "Hello, <userName>. Your birth month is: <birthMonth>"

// function helloUser(userName, birthMonth) {
    console.log("...");
// }

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// E5 - same like E3, but books are in an array now
// 5.1 Use a for loop to decrease the price of all books in the array to half of their original price
// 5.2 Use a for loop to convert all books' authors' last name to lowercase
// .toLower()
// 5.3 Use a for loop to convert all books' authors' last name to uppercase
// .toUpper()
// 5.4 Use a for loop to increase the price of all books written in german by 10 percent

let b1 = {

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// objects can have arrays as properties
// E1. Let's find out how many bikes the user has

// 1.1 write one line of code to print how many bikes the user has
// 1.2 write a function that takes an user as parameter and returns the number of bikes the user has

let person = {
    firstName: "Paul",
    lastName: "Anton",
    age: 28,

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// E4. 
// Write a function that takes two parameters: an array and a Number;
// The function returns the index of 
// the element's first occurence in the array;

function findPositionOfNumberInArray(array, number) {
    // iterate over the array -> for loop
    // compare the item of each position in the array to the <givenNumber>
    //                        -> equality operator === 
    //                        -> if statement

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// E1. The following function should return the sum of all elements in an array;
// The result of the code below should print:
// 8
// 4
// Fix the code below to work as expected:

let sum = 0;
function sumOfArrayValues(array){
    for (let i=0; i<array.length; i++) {
        sum += array[i];

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// E0. 
// Write a void function that 
// prints the sum of two numbers. 
// The 2 numbers should be passed in as parameters
// e.g. add(3,5)

function addNumbers(number1, number2){
    console.log("The sum is:...");
}

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// E0. Increase all prices larger than 2000 with 10%; 
prices = [120, 1600, 2400, 2800] 
for (i=0; i < prices.length; i++){

}
console.log("Result: " + prices);
// 120, 1600, 2640, 3080

// E1
// Start with 2 hardcoded arrays, e.g. prices1 & prices2

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// E7. 

// Start with 2 hardcoded arrays, e.g. prices1 & prices2
// Calculate a third array that contains the sum of the elements in the first two arrays.

prices1 = [12, 16, 24, 28] 
prices2 = [1, 1, 1, 1]
pricesSum = []
for (i=0; i < prices1.length; i++){

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ages = [12, 16, 24, 98]

// E0. Print all the ages in the array in reverse order;
for (let i = 0; i < ages.length; i = i + 1){
    console.log(ages[i]);
}


// E1. Print all positions of all ages greater than 18;
for (let i = 0; i < ages.length; i = i + 1){