# ranges.py
# Walker M. White (wmw2)
# October 6, 2013
"""Module showing how to use range with loops"""

def isprime(n):
    """Returns: True if no integer in 2..n-1 divides n, else False
    
    Precondition: n > 1 an int"""
    result = True
    
    for x in range(2,n):
        if n % x == 0:   # x "goes evenly" into n
            result = False
    
    return result


def sum_of_odd_squares(m, n):
    """Returns: sum of squares of odd integers in the range m..n.
    
    Precondition: n >= m are ints"""
    total = 0
  
    for x in range(m,n):
        if x % 2 == 1:   # odd
            total = total + (x*x)
    
    return total


def add_one(thelist):
    """Adds 1 to every element in the list
    
    Precondition: thelist is a list of all numbers      
    (either floats or ints)"""
    size = len(thelist)
    
    for k in range(size):
        thelist[k] = thelist[k]+1
    
    # procedure; no return