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Basic Ruby Programs for Interview?


Basic Ruby Programs for Interview?

# require 'prime'
# # p Prime.first(10)
# Prime.each(100) do |prime|
#   p prime  #=> 2, 3, 5, 7, 11, ...., 97
# end

#Prime number programe
 def prime_numbers max
for i in (2..10) do
    for j in (2..i) do
        break if i%j == 0
    end
    p "#{i} is a prime number." if i == j
end
 end

#Factorial Programe
n = gets
n = n.to_i
def fact(n)
  if n == 0
    1
  else
    n * fact(n-1)
  end
end
p fact(n)

#Reverse Number Programe
x = 12345
y = 0
while x > 0 do
    y = y*10
    y = y + (x%10)
    x = x/10

  puts y    
end


puts "What character do you want to make the pyramid out of?"
character = gets.chomp

puts "How many rows of #{character}'s do you want?"
row_count = gets.chomp.to_i

character_count = 1
width = 100

row_count.times do
puts (character * character_count).center(width)
character_count += 2
end

star_string = "*"
10.times do
    puts star_string
    star_string = star_string + "*"
end

def check_palandrom? word
    word == word.reverse ? true : false
end

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