These problems will use your knowledge of looping and conditionals, and we will build functions on top of that.
##silly_sum(arr) Write a function that takes an array of numbers, and returns the sum of each number multiplied by its index.
count += (number * index)
##num_square(max)
Create a function called num_square that will return an array of all perfect square numbers up to, but not exceeding a max number.
##is_prime(num)
Create a function to return true or false if a number passed in a prime number.
##primes(max)
Using your is_prime function, create a function primes that will return an array of all prime numbers up to a certain amount.
##letter_count(word)
Write a function that takes a string that finds out how many times a character occurs. For example, the string "apple" would print the following:
a - 1
p - 2
l - 1
e - 1
BONUS: Make sure that lower case letters and upper case letters count for the same character. Also, ignore spaces and punctuation.
##merge(arr1, arr2)
Write a function called merge. The function should take two sorted arrays of numbers as input and return a merged array of the sorted numbers from the input. For example, if the input arrays were var arr1 = [3,6,11]; var arr2 = [2,4,5,8,9]; Then the returned array would be: [2,3,4,5,6,8,9,11].