techtwin / js-beatles-loops-lab-js-apply-000

Beatles Loops

Objectives

• Build a for loop
• Build a while loop
• Build a do-while loop

Instructions

Make sure you run the tests with learn.

1. Create a function theBeatlesPlay, which accepts two parameters--an array of musicians and an array of instruments.

   • Create a variable with an empty array.
   • Use a for loop, which iterates over the array of musicians. Be careful about what value you set your counter variable to store. (Hint: Think about what the first index of an array is).
   • The first time through the loop, it should create a string using the first index of the musicians array and the first index of the instruments array: "John Lennon plays guitar".
   • Add this string to the empty array you created. The loop should make the same sentence for every member of the musicians array.
   • The function should return the array of new strings containing what instruments each musician plays.

2. Create a function johnLennonFacts.

   • This function will accept one argument, an array of facts about John Lennon (note that it might not be exactly the following facts):

   const facts = [
     "He was the last Beatle to learn to drive",
     "He was never a vegetarian",
     "He was a choir boy and boy scout",
     "He hated the sound of his own voice"
   ];

   • Use a while loop to loop over the facts array and add "!!!" to the end of every fact.

   • Return an array of strings with exclamation points.

3. Create a function iLoveTheBeatles which accepts a number as a parameter.

   • The function should create a variable that stores an empty array.
   • Implement a do-while loop inside the function that adds "I love the Beatles!" to the empty array.
   • The loop should then increment the number passed in as a parameter. The condition of the loop should check to see that the parameter number is less than 15. It should contain a number of strings that represents the difference between the input number and 15.
   • Return the array with the strings "I love the Beatles!".

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