How do I generate the first n prime numbers?

Question

I am learning Ruby and doing some math stuff. One of the things I want to do is generate prime numbers.

I want to generate the first ten prime numbers and the first ten

Answer 1

Ruby: Print N prime Numbers http://mishra-vishal.blogspot.in/2013/07/include-math-def-printnprimenumbernoofp.html

include Math

def print_n_prime_number(no_of_primes=nil)

  no_of_primes = 100 if no_of_primes.nil?

  puts "1 \n2"

  count = 1

  number = 3

  while count < no_of_primes

sq_rt_of_num = Math.sqrt(number)

number_divisible_by = 2

while number_divisible_by <= sq_rt_of_num

  break if(number % number_divisible_by == 0)

  number_divisible_by = number_divisible_by + 1

end

if number_divisible_by > sq_rt_of_num

  puts number

  count = count+1

end

number = number + 2

  end

end

print_n_prime_number