Interview Challenges

Fibonacci.rb

puts "Enter a number you want to calculate up to in the Fibonacci sequence"
max = gets.chomp

#Fibonacci 
sequence = []
0.upto(max.to_i) do |num|
	if num > 2 
		what_to_push = sequence[num - 1] + sequence[num - 2] 
		sequence << what_to_push
	else 
		sequence << num 
	end 
end
puts "#{sequence}"

Fizzbuzz.rb

Fizzbuzz game 
puts "Please enter a number you want to fizzbuzz up to"
user_input = gets.chomp 

1.upto(user_input.to_i) do |num|
	if num % 15 == 0 
		puts "FizzBuzz"
	elsif num % 3 == 0
		puts "Fizz"
	elsif num % 5 == 0
		puts "Buzz"
	else 
		puts num
	end
end

loops.rb

# Making loops in many ways

list = [1,2,3,4,5,6,7,8,9,10]

# each loop 
sum = 0
list.each { |num| sum+=num }
puts "Each: #{sum}" 

# while loop
sum = 0 
index = 0
while list.length > index
	value = list[index] 
	sum += value 
	index += 1 
end
puts "While: #{sum}"

# for loop 
sum = 0 
for i in list do 
	sum += i 
end
puts "For: #{sum}"

# loop
sum = 0
list.length.times { |num| sum += num }
puts "Loop: #{sum}"

# until 
sum = 0
index = 0  
until index = list.length 
	value = list[index]
	sum += value 
	index += 1
end

puts "Until: #{until}"