RandoMathoLimted

# RandoMathoLimited.py
# Author:           Alex Paarfus <[email protected]>
# Date:             2018-08-15
#
# Requirements:
#   Import random
#   Math to be built into a function
#       Requires 3 params:
#           $1 == [+,-,/,*]
#           $2 == number
#           $3 == number
#       Returns:
#           $2 $1 $3 == $return
#           Needs to print $return
#           if $1 !allowed; return "unknown"
#   Infinite Loop to:
#       Prompt the user for an operator [+,-,/,*,q]
#           Must accept 'q' to quit
#   num1 and num2 MUST be generated with methods from Random
#       Must be between 0.0 and 10.0
#       Based on example: 1, 1.1, 1.11 are valid

# import random
import random


# Functions
# __mathop -- perform a math operation
#   requires:
#       param1 == operator as String
#       param2 == number
#       param3 == number
#
# -param1 will always be a string, so we'll determine the operator by doing
# simple string comparisons
# -param2 & param3 will always be numbers
def __mathop(op, a, b):
    # display the parameters passed to method
    print("mathop called: " + op + " " + str(a) + " " + str(b))
    # deterime which operator "op" is
    # if one is found, return a (op) b
    if (op == "+"):
        return a + b
    if (op == "-"):
        return a - b
    if (op == "/"):
        return a / b
    if (op == "*"):
        return a * b
    # default is "unknown"
    return "unknown"

# Preface statement
print("=============================================================================")
print("== This program performs basic mathematic operations on two random numbers ==")
print("== Both generated numbers will be between 0.0 and 10.0                     ==")
print("== Math Operations: Addition, Subtraction, Multiplication and Division     ==")
print("=============================================================================")

# infinite loop
while (True):
    # prompt user for input
    strInput = input("Enter an operator [+,-,/,*] or q to quit: ")
    # if the user enters the letter "q"
    if (strInput == "q"):
        # break out of the loop and, as a result, quit the program
        break
    # Generate our two random numbers
    # To get numbers that look like that in the example, generating based on the range
    # of 100 to 1,000; then dividing that number by 100
    #
    # This way we will always receive numbers that are between 0.0 <= num <= 10.0
    # However, this also ensure that we only have at most two decimal places per number
    # eg:       1, 8.7, 3.14, etc
    num1 = random.randint(100, 1000) / 100
    num2 = random.randint(100, 1000) / 100
    # print the inputs: "num1 strInput num2 = (returnVal)"
    # I've opted to return the method's value directly into the print statement
    # While it doesn't reall matter here; this could potentially save of memory, maybe
    # Its also just a little cleaner than having a third variable that gets defined and
    # used all of twice.
    print(str(num1) + " " + strInput + " " + str(num2) + " = " + str(__mathop(strInput, num1, num2)))