""" Purpose: demonstrate arithmetic
"""

# Name some variables and print their values
a = 20
b =  3

print( "Values of interest" )
print( "a:", a )
print( "b:", b )
print()

# Perform calculations
total        = a +  b # the variable total will be equal to the sum of the values of variables a and b. 20 + 3
difference   = a -  b
product      = a *  b
dec_quotient = a /  b # this is decimal division. the result can be a decimal
int_quotient = a // b # this is integer division. the result will be an int. it will cut off the remainder. ex: 6.333->6
power        = a ** b # exponentiation. this can be used to take the root. ex: a ** (1/2) is square root of a
remainder    = a %  b # the remainder when a is divided by b. 20/3, 2 is the remainder
                      # since 3 goes into 20 six times, w/ 2 left over
# good programming tip: don't do arithmetic/operations within a print() statement
# having spaces around operators (i.e. *, +, =) is for readability
# python has libraries (such as the math library) for importing functions we can use
# you can do many operations on one line, but spreading up your commands over several lines is more readable
# your computer can't store infinite numbers, so it provides an approx. when the number is too large.
# 15-16 digits is the max

# Print results
print( "Results" )

print( "a + b: ", total ) # this will print the literal string "a + b:", then the value of the variable total
print( "a - b: ", difference )
print( "a * b: ", product )
print( "a / b: ", dec_quotient )
print( "a // b:", int_quotient )
print( "a ** b:", power )
print( "a % b: ", remainder )