mehagel

def get_grade(array)
	
	sum=array.inject(0){|sum,i| sum + i}
	avg = sum/array.length
	
		if avg  >=90
			puts "A"
			return 
		elsif avg  >= 80
			puts "B"

mehagel

def times_table(rows)
	(1..(rows)).each do |r|
	line = ""
	(1..(rows)).each{ |c| line += "#{r * c}\t"}
	puts line
	end
end
times_table(100)

mehagel

def separate_comma(number)
	if number < 1000
	puts number
	end 
  begin
    parts = number.to_s.split('.')
    parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{delimiter}")
    parts.join separator
  rescue
   return number

mehagel

def mean(array)
 results =0
 mean = 0
	array.length.times do |i|
	results = results + array[i]
	puts mean = results.to_i/ array.length
	end
  results
  mean
end

mehagel

def factorial(n)
  if n <= 0
    return 1
  else
    return n * factorial(n-1)
  end
end
factorial(56)

mehagel

def reverse_words(str)
   new_str= str.split.reverse.join(' ')
   return new_str.reverse
end

reverse_words("I cant wait to get home")

mehagel

ef print_triangle(rows)
	if 1.upto (rows) do |i|
		puts "*" * i
		end
	else
		return nil
	end
end

print_triangle(22)

mehagel

def total(array)
 results =0
 array.length.times do |i|
 results = results + array[i]
  end
  results
end
total ([5,6,7,8])

mehagel

def shortest_string(array)
	i=0
	if array.length > i
		return (array.min_by {|x| x.length })
	else
		return nil
	end
end

puts shortest_string(["cat","dog","horse","pig","elephant","rabbit"])

mehagel

def largest_string(array)
	i=0
	if array.length > i
		return (array.max_by {|x| x.length })
	else
		return nil
	end
end

puts largest_string(["cat","dog","horse","pig","elephant","rabbit"])