def list_min(some_list):
    '''returns the minimum value of some_list'''
    best = some_list[0] # minimum value so far
    for list_el in some_list:
        if list_el < best:
            best = list_el
    return best

def print_list(list_to_print):
    '''print out list_to_print with the positions of each element'''
    for i in range(0, len(list_to_print)):
        print("element {0} is {1}".format(i, list_to_print[i]))

#######################
# Grade scaling example

grades = [84, 93, 86, 98, 90]
print(grades)
for i in range(0, len(grades)):
    grades[i] *= 0.8
print(grades)

#######################
# Multiplication table example

def mult_table(num_rows, num_cols):
    '''prints a multiplication table'''
    for i in range(1, num_rows + 1):
        for j in range(1, num_cols + 1):
            print(i * j, end='\t')
        print()        

######################
# College cost example

years = 0
cost = 61354
annual_increase = 0.0386
while cost < 100000:
    years += 1
    cost += cost * annual_increase
    print("Cost in {0} is ${1:.0f}".format(2015 + years, cost))
print("Number of years passed is " + str(years))