Lab description:
Similar to Lab 2 except that functions are used to compute the numbers.

Code:

userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")

while userinput == 1:
    print ("sum numbers")
    sumnumberx = input ("choose your x value: ")
    sumnumbery = input ("choose your y value: ")
    float (sumnumberx)
    float (sumnumbery)
    def sumnumbers (sumnumberx, sumnumbery):
        return sumnumberx + sumnumbery
    print (sumnumbers(sumnumberx, sumnumbery))

    startover = input ("would you like to start over? \n(11) yes\n(12) no\n")
    if startover == 11:
        userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")
    elif startover != 11:
        userinput = 7

while userinput == 2:
    print ("subtract numbers")
    subnumberx = input ("choose your x value: ")
    subnumbery = input ("choose your y value: ")
    float (subnumberx)
    float (subnumbery)
    def subnumbers (subnumberx, subnumbery):
        return subnumberx - subnumbery
    print (subnumbers(subnumberx, subnumbery))

    startover = input ("would you like to start over? \n(11) yes\n(12) no\n")
    if startover == 11:
        userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")
    elif startover != 11:
        userinput = 7

while userinput ==3:
    print ("multiply numbers")
    mulnumberx = input ("choose your x value: ")
    mulnumbery = input ("choose your y value: ")
    float (mulnumberx)
    float (mulnumbery)
    def mulnumbers (mulnumberx, mulnumbery):
        return mulnumberx * mulnumbery
    print (mulnumbers(mulnumberx, mulnumbery))

    startover = input ("would you like to start over? \n(11) yes\n(12) no\n")
    if startover == 11:
        userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")
    elif startover != 11:
        userinput = 7

while userinput ==4:
    print ("divide numbers")
    divnumberx = input ("choose your x value: ")
    divnumbery = input ("choose your y value: ")
    float (divnumberx)
    float (divnumbery)
    def divnumbers (divnumberx, divnumbery):
        return divnumberx / divnumbery
    print (divnumbers(divnumberx, divnumbery))

    startover = input ("would you like to start over? \n(11) yes\n(12) no\n")
    if startover == 11:
        userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")
    elif startover != 11:
        userinput = 7

while userinput ==5:
    print ("remainder of numbers")
    remnumberx = input ("choose your x value: ")
    remnumbery = input ("choose your y value: ")
    float (remnumberx)
    float (remnumbery)
    def remnumbers (remnumberx, remnumbery):
        return remnumberx % remnumbery
    print (remnumbers(remnumberx, remnumbery))

    startover = input ("would you like to start over? \n(11) yes\n(12) no\n")
    if startover == 11:
        userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")
    elif startover != 11:
        userinput = 7

while userinput ==6:
    import math
    print ("compare numbers")
    comnumberx = input ("choose your x value: ")
    comnumbery = input ("choose your y value: ")
    float (comnumberx)
    float (comnumbery)
    def comnumbers (comnumberx, comnumbery):
        return comnumberx - comnumbery
    print (abs(comnumbers(comnumberx, comnumbery)))

    startover = input ("would you like to start over? \n(11) yes\n(12) no\n")
    if startover == 11:
        userinput = input ("Choose an option: \n(1) sum numbers \n(2) subtract numbers \n(3) multiply numbers \n(4) divide numbers \n(5) remainder of numbers \n(6) compare numbers \n(7) exit\n")
    elif startover != 11:
        userinput = 7

Screenshot: