text: #variables_and_loops.py
  
  import numpy as np #we use numpy for lots of things
  
  def main():
  	i = 0 #integers can be declared with a number
  	n = 10 #here is another integer
  	x = 119.0 #floating point nums are declared with a "."
  
  	#we can use numpy to declare arrays quickly
  	y = np.zeros(n, dtype = float) #declares 10 zeros as floats using np
  
  	#we can use for loops to iterate with a variable
  	for i in range(n): #i in range [0, n-1]
  		y[i] = 2.0 * float(i) + 1 #set y = 2i + 1 as floats
  
  	#we can also simply iterate through a variable
  	for y_element in y:
  		print(y_element)
  
  #execute the main function
  if __name__ == "__main__":
  	main()
  