title: Prime Numbers
signature: prime_numbers <- function(n) {
source_py: def prime_numbers(n):
      if (n <= 1):
          return False
      for i in range(2, n):
          if ((n % i) == 0):
              return False
      return True
source_cpp: bool prime_numbers(int n) {
    if ( n <= 1 ) return false;
    for ( int i = 2;
    i < n;
    i ++ ) if ( n % i == 0 ) return false;
    return true;
  }