// 1. Write a function called helloWorld that returns the string 'Hello World!'.

function helloWorld() {
  return "Hello World!";
}

// helloWorld();

/*
2. Write a function called lambdaSchool that has a single parameter called num.
     num will be a positive integer.
     If num is divisible by 3 return the string 'Lambda'
     If num is divisible by 5 return the string 'School'
     If num is divisible by 3 AND 5 return the string 'Lambda School' (notice the space)
     If num is NOT divisible by 3 or 5 then return num.
     Example:
             lambdaSchool(15); // returns 'Lambda School'
             lambdaSchool(8); // returns 8
*/


function lambdaSchool(num) {


   if (num % 3 === 0 && num % 5 === 0)
    return 'Lambda School';

  else if (num % 3 === 0)
    return 'Lambda';

  else if (num % 5 === 0)
    return 'School';

  else
    return num;

}

// lambdaSchool (15) // returns "Lambda School"!

/*
3. Write a function called longestString that has a single parameter called strs.
     strs will be an array of strings.
     Return the longest string that is in strs.
     If there is a tie for the longest string then return the one that occurs first.
     Example:
             longestString(['hi', 'hello', 'ni hao', 'guten tag']); // returns 'guten tag'
             longestString(['JavaScript', 'HTML', 'CSS']); // returns 'JavaScript'
*/


function longestString( strs) {

  var longestWord = '';

  for(var i = 0; i < strs.length; i++){
    if (strs[i].length > longestWord.length){
      longestWord = strs[i];


    }
  }
   return longestWord
}

// longestString(['JavaScript', 'HTML', 'CSS']); // Returns JS!


/*
4. Write a function called computeUserAverageAge that has a single parameter called users
     users is an array of user objects.
     Each user object has a property called age that is a number.
     Compute the average age of all user objects in the users array.
     Round off the decimals if needed and return the number.
     Example:
             const users = [{
               name: 'Brendan Eich',
               age: 56,
             }, {
               name: 'Linus Torvalds',
               age: 48,
             }, {
               name: 'Margaret Hamilton',
               age: 81,
             }];
             computeUserAverageAge(users); // returns 62 (This number is rounded up from 61.6666)
*/


const user = [{
  name: 'Patrick',
  age: 29,
}, {
  name: 'John',
  age: 27,
}, {
  name: 'Tommy',
  age: 24,
}];

function computeUserAverageAge(user) {
let userAge = 0; // initial expression
let count = user.length
for (let i = 0; i < user.length; i++) {
  userAge = userAge + user[i].age
}
return Math.round (userAge / count)
}

// computeUserAverageAge(user) // output 27